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Minimum-variance unbiased estimator

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For practical statistics problems, it is important to determine the MVUE if one exists, since less-than-optimal procedures would naturally be avoided, other things being equal. This has led to substantial development of statistical theory related to the problem of optimal estimation.
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leads to good results in most practical settings—making MVUE a natural starting point for a broad range of analyses—a targeted specification may perform better for a given problem; thus, MVUE is not always the best stopping point.
1484: 1152: 1301: 455: 1720: 1356: 803: 385: 721: 297: 1775: 447: 258: 1576: 860: 2009:{\displaystyle \eta (X)=\operatorname {E} (\delta (X)\mid T)=\operatorname {E} \left(\left.{\frac {T^{2}}{2}}\,\right|\,T\right)={\frac {T^{2}}{2}}={\frac {\log(1+e^{-X})^{2}}{2}}} 2138: 640: 1829: 1544: 1197: 1031: 832: 671: 414: 199: 317: 1564: 852: 53: 1367: 17: 1073: 1205: 2258: 100: 2262: 600:{\displaystyle \operatorname {var} (\delta (X_{1},X_{2},\ldots ,X_{n}))\leq \operatorname {var} ({\tilde {\delta }}(X_{1},X_{2},\ldots ,X_{n}))} 72: 3709: 4214: 79: 4364: 1666: 3988: 2629: 2048: 86: 3762: 4201: 2152:. This is a scaled and shifted (so unbiased) transform of the sample maximum, which is a sufficient and complete statistic. See 68: 1174: 1161:. In some cases biased estimators have lower MSE because they have a smaller variance than does any unbiased estimator; see 2624: 2324: 2376: 1312: 740: 322: 4011: 3903: 2055: 119: 687: 263: 4616: 4189: 4063: 1731: 4247: 3908: 3653: 3024: 2614: 1650:{\displaystyle \operatorname {E} (T)={\frac {1}{\theta }},\quad \operatorname {var} (T)={\frac {1}{\theta ^{2}}}} 93: 423: 4298: 3510: 3317: 3206: 3164: 2234: 2171: 991:{\displaystyle \eta (X_{1},X_{2},\ldots ,X_{n})=\operatorname {E} (\delta (X_{1},X_{2},\ldots ,X_{n})\mid T)\,} 204: 57: 3238: 2182: 2020: 731: 4541: 3500: 2403: 2072: 4092: 4041: 4026: 4016: 3885: 3757: 3724: 3550: 3505: 3335: 2096: 4604: 4436: 4237: 4161: 3462: 3216: 2885: 2349: 2019:
This example illustrates that an unbiased function of the complete sufficient statistic will be UMVU, as
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Further, for other distributions the sample mean and sample variance are not in general MVUEs – for a
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that has lower variance than any other unbiased estimator for all possible values of the parameter.
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need not exist, but if it does and if it is unbiased, it is the MVUE. Since the
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one can also prove that determining the MVUE is simply a matter of finding a
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exists, then one can prove there is an essentially unique MVUE. Using the
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is a complete sufficient statistic for the family of densities. Then
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Unbiased estimators and their applications, Vol.1: Univariate case
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Statistical Theory: Notes for a Course in Theoretical Statistics
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are the MVUEs for the population mean and population variance.
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For a normal distribution with unknown mean and variance, the
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is not unbiased for the population standard deviation – see
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First we recognize that the density can be written as
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Consider the data to be a single observation from an
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uniformly minimum-variance unbiased estimator (UMVUE)
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Autoregressive conditional heteroskedasticity (ARCH)
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Here we use Lehmann–ScheffĂ© theorem to get the MVUE
1831:is complete sufficient, thus the UMVU estimator is 1351:{\displaystyle g(\theta )={\frac {1}{\theta ^{2}}}} 60:. Unsourced material may be challenged and removed. 3677: 2132: 2071:exemplars are chosen (without replacement) from a 2008: 1823: 1769: 1714: 1649: 1558: 1538: 1478: 1350: 1295: 1191: 1146: 1025: 990: 846: 826: 798:{\displaystyle \delta (X_{1},X_{2},\ldots ,X_{n})} 797: 715: 665: 634: 599: 441: 408: 380:{\displaystyle \delta (X_{1},X_{2},\ldots ,X_{n})} 379: 311: 291: 252: 193: 27:Unbiased statistical estimator minimizing variance 2224: 260:i.i.d. from some member of a family of densities 4630: 2285:Theoretical statistics: Topics for a core course 3763:Multivariate adaptive regression splines (MARS) 716:{\displaystyle p_{\theta },\theta \in \Omega } 319:is the parameter space. An unbiased estimator 292:{\displaystyle p_{\theta },\theta \in \Omega } 2318: 1770:{\displaystyle \delta (X)={\frac {T^{2}}{2}}} 2298:. Kluwer Academic Publishers. pp. 521p. 2293: 2257:: CS1 maint: multiple names: authors list ( 2363: 2325: 2311: 2261:) CS1 maint: numeric names: authors list ( 1306:and we wish to find the UMVU estimator of 442:{\displaystyle \forall \theta \in \Omega } 138:minimum-variance unbiased estimator (MVUE) 2976: 2058:with unknown upper and lower bounds, the 2049:unbiased estimation of standard deviation 1927: 1921: 1185: 987: 253:{\displaystyle X_{1},X_{2},\ldots ,X_{n}} 120:Learn how and when to remove this message 2075:over the set {1, 2, ...,  2227:U-statistics : theory and practice 14: 4631: 4289:Kaplan–Meier estimator (product limit) 2274: 1050: 159:with the desirability metric of least 4362: 3929: 3676: 2975: 2745: 2362: 2306: 69:"Minimum-variance unbiased estimator" 4599: 4299:Accelerated failure time (AFT) model 2133:{\displaystyle {\frac {k+1}{k}}m-1,} 2062:is the MVUE for the population mean. 1489:Which is an exponential family with 58:adding citations to reliable sources 29: 4611: 3894:Analysis of variance (ANOVA, anova) 2746: 2294:Voinov V. G., Nikulin M.S. (1993). 2193: 635:{\displaystyle {\tilde {\delta }}.} 24: 18:Minimum variance unbiased estimator 3989:Cochran–Mantel–Haenszel statistics 2615:Pearson product-moment correlation 2279:. Springer. pp. 47–48, 57–58. 1889: 1856: 1670: 1580: 1175:absolutely continuous distribution 918: 710: 436: 427: 306: 286: 155:While combining the constraint of 25: 4650: 2026: 610:for any other unbiased estimator 4610: 4598: 4586: 4573: 4572: 4363: 1824:{\displaystyle T=\log(1+e^{-x})} 1539:{\displaystyle T=\log(1+e^{-x})} 34: 4248:Least-squares spectral analysis 1611: 45:needs additional citations for 3229:Mean-unbiased minimum-variance 2332: 2218: 2172:Best linear unbiased estimator 1991: 1968: 1883: 1874: 1868: 1862: 1850: 1844: 1818: 1796: 1744: 1738: 1689: 1676: 1624: 1618: 1592: 1586: 1533: 1511: 1473: 1470: 1464: 1452: 1430: 1415: 1325: 1319: 1275: 1252: 1225: 1219: 1132: 1128: 1122: 1113: 1107: 1101: 1089: 1083: 1017: 1011: 984: 975: 930: 924: 912: 867: 821: 815: 792: 747: 660: 654: 623: 594: 591: 546: 540: 531: 519: 516: 471: 465: 403: 397: 374: 329: 188: 182: 13: 1: 4542:Geographic information system 3758:Simultaneous equations models 2289:DOI 10.1007/978-0-387-93839-4 2211: 2073:discrete uniform distribution 1570:for a derivation which shows 167: 3725:Coefficient of determination 3336:Uniformly most powerful test 1566:is complete sufficient. See 1192:{\displaystyle \mathbb {R} } 644:If an unbiased estimator of 7: 4294:Proportional hazards models 4238:Spectral density estimation 4220:Vector autoregression (VAR) 3654:Maximum posterior estimator 2886:Randomized controlled trial 2160: 2079:} with unknown upper bound 1026:{\displaystyle g(\theta ).} 10: 4655: 4054:Multivariate distributions 2474:Average absolute deviation 2283:Keener, Robert W. (2010). 2275:Keener, Robert W. (2006). 2225:Lee, A. J., 1946- (1990). 1168: 827:{\displaystyle g(\theta )} 727:unbiased estimator on it. 666:{\displaystyle g(\theta )} 409:{\displaystyle g(\theta )} 194:{\displaystyle g(\theta )} 4568: 4522: 4459: 4412: 4375: 4371: 4358: 4330: 4312: 4279: 4270: 4228: 4175: 4136: 4085: 4076: 4042:Structural equation model 3997: 3954: 3950: 3925: 3884: 3850: 3804: 3771: 3733: 3700: 3696: 3672: 3612: 3521: 3440: 3404: 3395: 3378:Score/Lagrange multiplier 3363: 3316: 3261: 3187: 3178: 2988: 2984: 2971: 2930: 2904: 2856: 2811: 2793:Sample size determination 2758: 2754: 2741: 2645: 2600: 2574: 2556: 2512: 2464: 2384: 2375: 2371: 2358: 2340: 2205:Minimum mean square error 2045:sample standard deviation 1159:among unbiased estimators 1045:minimum mean square error 684:statistic for the family 4537:Environmental statistics 4059:Elliptical distributions 3852:Generalized linear model 3781:Simple linear regression 3551:Hodges–Lehmann estimator 3008:Probability distribution 2917:Stochastic approximation 2479:Coefficient of variation 4197:Cross-correlation (XCF) 3805:Non-standard predictors 3239:Lehmann–ScheffĂ© theorem 2912:Adaptive clinical trial 2229:. New York: M. Dekker. 2183:Lehmann–ScheffĂ© theorem 2021:Lehmann–ScheffĂ© theorem 1157:the MVUE minimizes MSE 732:Lehmann–ScheffĂ© theorem 312:{\displaystyle \Omega } 172:Consider estimation of 4593:Mathematics portal 4414:Engineering statistics 4322:Nelson–Aalen estimator 3899:Analysis of covariance 3786:Ordinary least squares 3710:Pearson product-moment 3114:Statistical functional 3025:Empirical distribution 2858:Controlled experiments 2587:Frequency distribution 2365:Descriptive statistics 2287:. New York: Springer. 2178:Bias–variance tradeoff 2134: 2010: 1825: 1771: 1716: 1651: 1560: 1540: 1480: 1352: 1297: 1193: 1148: 1063:(MSE) of an estimator 1027: 992: 848: 828: 799: 737:Put formally, suppose 717: 667: 636: 601: 443: 410: 381: 313: 293: 254: 195: 4509:Population statistics 4451:System identification 4185:Autocorrelation (ACF) 4113:Exponential smoothing 4027:Discriminant analysis 4022:Canonical correlation 3886:Partition of variance 3748:Regression validation 3592:(Jonckheere–Terpstra) 3491:Likelihood-ratio test 3180:Frequentist inference 3092:Location–scale family 3013:Sampling distribution 2978:Statistical inference 2945:Cross-sectional study 2932:Observational studies 2891:Randomized experiment 2720:Stem-and-leaf display 2522:Central limit theorem 2135: 2011: 1826: 1772: 1717: 1652: 1561: 1541: 1481: 1353: 1298: 1194: 1149: 1028: 993: 849: 829: 800: 718: 675:Rao–Blackwell theorem 668: 637: 602: 444: 411: 382: 314: 294: 255: 196: 4432:Probabilistic design 4017:Principal components 3860:Exponential families 3812:Nonlinear regression 3791:General linear model 3753:Mixed effects models 3743:Errors and residuals 3720:Confounding variable 3622:Bayesian probability 3600:Van der Waerden test 3590:Ordered alternative 3355:Multiple comparisons 3234:Rao–Blackwellization 3197:Estimating equations 3153:Statistical distance 2871:Factorial experiment 2404:Arithmetic-Geometric 2097: 2056:uniform distribution 1838: 1781: 1732: 1667: 1577: 1550: 1496: 1491:sufficient statistic 1368: 1313: 1206: 1181: 1074: 1043:, particularly with 1005: 861: 838: 809: 741: 688: 648: 614: 456: 424: 391: 323: 303: 264: 205: 176: 54:improve this article 4504:Official statistics 4427:Methods engineering 4108:Seasonal adjustment 3876:Poisson regressions 3796:Bayesian regression 3735:Regression analysis 3715:Partial correlation 3687:Regression analysis 3286:Prediction interval 3281:Likelihood interval 3271:Confidence interval 3263:Interval estimation 3224:Unbiased estimators 3042:Model specification 2922:Up-and-down designs 2610:Partial correlation 2566:Index of dispersion 2484:Interquartile range 2154:German tank problem 1057:efficient estimator 1051:Estimator selection 4524:Spatial statistics 4404:Medical statistics 4304:First hitting time 4258:Whittle likelihood 3909:Degrees of freedom 3904:Multivariate ANOVA 3837:Heteroscedasticity 3649:Bayesian estimator 3614:Bayesian inference 3463:Kolmogorov–Smirnov 3348:Randomization test 3318:Testing hypotheses 3291:Tolerance interval 3202:Maximum likelihood 3097:Exponential family 3030:Density estimation 2990:Statistical theory 2950:Natural experiment 2896:Scientific control 2813:Survey methodology 2499:Standard deviation 2130: 2006: 1821: 1767: 1712: 1647: 1568:exponential family 1556: 1536: 1476: 1348: 1293: 1189: 1144: 1061:mean squared error 1023: 988: 844: 824: 795: 713: 663: 632: 597: 439: 406: 377: 309: 289: 250: 191: 146:unbiased estimator 4626: 4625: 4564: 4563: 4560: 4559: 4499:National accounts 4469:Actuarial science 4461:Social statistics 4354: 4353: 4350: 4349: 4346: 4345: 4281:Survival function 4266: 4265: 4128:Granger causality 3969:Contingency table 3944:Survival analysis 3921: 3920: 3917: 3916: 3773:Linear regression 3668: 3667: 3664: 3663: 3639:Credible interval 3608: 3607: 3391: 3390: 3207:Method of moments 3076:Parametric family 3037:Statistical model 2967: 2966: 2963: 2962: 2881:Random assignment 2803:Statistical power 2737: 2736: 2733: 2732: 2582:Contingency table 2552: 2551: 2419:Generalized/power 2116: 2004: 1954: 1919: 1765: 1710: 1645: 1606: 1559:{\displaystyle T} 1407: 1346: 1291: 1143: 847:{\displaystyle T} 723:and conditioning 626: 543: 130: 129: 122: 104: 16:(Redirected from 4646: 4614: 4613: 4602: 4601: 4591: 4590: 4576: 4575: 4479:Crime statistics 4373: 4372: 4360: 4359: 4277: 4276: 4243:Fourier analysis 4230:Frequency domain 4210: 4157: 4123:Structural break 4083: 4082: 4032:Cluster analysis 3979:Log-linear model 3952: 3951: 3927: 3926: 3868: 3842:Homoscedasticity 3698: 3697: 3674: 3673: 3593: 3585: 3577: 3576:(Kruskal–Wallis) 3561: 3546: 3501:Cross validation 3486: 3468:Anderson–Darling 3415: 3402: 3401: 3373:Likelihood-ratio 3365:Parametric tests 3343:Permutation test 3326:1- & 2-tails 3217:Minimum distance 3189:Point estimation 3185: 3184: 3136:Optimal decision 3087: 2986: 2985: 2973: 2972: 2955:Quasi-experiment 2905:Adaptive designs 2756: 2755: 2743: 2742: 2620:Rank correlation 2382: 2381: 2373: 2372: 2360: 2359: 2327: 2320: 2313: 2304: 2303: 2299: 2280: 2267: 2266: 2256: 2248: 2222: 2194:Bayesian analogs 2167:CramĂ©r–Rao bound 2139: 2137: 2136: 2131: 2117: 2112: 2101: 2015: 2013: 2012: 2007: 2005: 2000: 1999: 1998: 1989: 1988: 1960: 1955: 1950: 1949: 1940: 1935: 1931: 1926: 1922: 1920: 1915: 1914: 1905: 1830: 1828: 1827: 1822: 1817: 1816: 1777:is unbiased and 1776: 1774: 1773: 1768: 1766: 1761: 1760: 1751: 1721: 1719: 1718: 1713: 1711: 1709: 1708: 1696: 1688: 1687: 1656: 1654: 1653: 1648: 1646: 1644: 1643: 1631: 1607: 1599: 1565: 1563: 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202: 177: 174: 173: 170: 126: 115: 109: 106: 63: 61: 51: 39: 28: 23: 22: 15: 12: 11: 5: 4652: 4642: 4641: 4624: 4623: 4621: 4620: 4608: 4596: 4582: 4569: 4566: 4565: 4562: 4561: 4558: 4557: 4555: 4554: 4549: 4544: 4539: 4534: 4528: 4526: 4520: 4519: 4517: 4516: 4511: 4506: 4501: 4496: 4491: 4486: 4481: 4476: 4471: 4465: 4463: 4457: 4456: 4454: 4453: 4448: 4443: 4434: 4429: 4424: 4418: 4416: 4410: 4409: 4407: 4406: 4401: 4396: 4387: 4385:Bioinformatics 4381: 4379: 4369: 4368: 4356: 4355: 4352: 4351: 4348: 4347: 4344: 4343: 4341: 4340: 4334: 4332: 4328: 4327: 4325: 4324: 4318: 4316: 4310: 4309: 4307: 4306: 4301: 4296: 4291: 4285: 4283: 4274: 4268: 4267: 4264: 4263: 4261: 4260: 4255: 4250: 4245: 4240: 4234: 4232: 4226: 4225: 4223: 4222: 4217: 4212: 4204: 4199: 4194: 4193: 4192: 4190:partial (PACF) 4181: 4179: 4173: 4172: 4170: 4169: 4164: 4159: 4151: 4146: 4140: 4138: 4137:Specific tests 4134: 4133: 4131: 4130: 4125: 4120: 4115: 4110: 4105: 4100: 4095: 4089: 4087: 4080: 4074: 4073: 4071: 4070: 4069: 4068: 4067: 4066: 4051: 4050: 4049: 4039: 4037:Classification 4034: 4029: 4024: 4019: 4014: 4009: 4003: 4001: 3995: 3994: 3992: 3991: 3986: 3984:McNemar's test 3981: 3976: 3971: 3966: 3960: 3958: 3948: 3947: 3923: 3922: 3919: 3918: 3915: 3914: 3912: 3911: 3906: 3901: 3896: 3890: 3888: 3882: 3881: 3879: 3878: 3862: 3856: 3854: 3848: 3847: 3845: 3844: 3839: 3834: 3829: 3824: 3822:Semiparametric 3819: 3814: 3808: 3806: 3802: 3801: 3799: 3798: 3793: 3788: 3783: 3777: 3775: 3769: 3768: 3766: 3765: 3760: 3755: 3750: 3745: 3739: 3737: 3731: 3730: 3728: 3727: 3722: 3717: 3712: 3706: 3704: 3694: 3693: 3690: 3689: 3684: 3678: 3670: 3669: 3666: 3665: 3662: 3661: 3659: 3658: 3657: 3656: 3646: 3641: 3636: 3635: 3634: 3629: 3618: 3616: 3610: 3609: 3606: 3605: 3603: 3602: 3597: 3596: 3595: 3587: 3579: 3563: 3560:(Mann–Whitney) 3555: 3554: 3553: 3540: 3539: 3538: 3527: 3525: 3519: 3518: 3516: 3515: 3514: 3513: 3508: 3503: 3493: 3488: 3485:(Shapiro–Wilk) 3480: 3475: 3470: 3465: 3460: 3452: 3446: 3444: 3438: 3437: 3435: 3434: 3426: 3417: 3405: 3399: 3397:Specific tests 3393: 3392: 3389: 3388: 3386: 3385: 3380: 3375: 3369: 3367: 3361: 3360: 3358: 3357: 3352: 3351: 3350: 3340: 3339: 3338: 3328: 3322: 3320: 3314: 3313: 3311: 3310: 3309: 3308: 3303: 3293: 3288: 3283: 3278: 3273: 3267: 3265: 3259: 3258: 3256: 3255: 3250: 3249: 3248: 3243: 3242: 3241: 3236: 3221: 3220: 3219: 3214: 3209: 3204: 3193: 3191: 3182: 3176: 3175: 3173: 3172: 3167: 3162: 3161: 3160: 3150: 3145: 3144: 3143: 3133: 3132: 3131: 3126: 3121: 3111: 3106: 3101: 3100: 3099: 3094: 3089: 3073: 3072: 3071: 3066: 3061: 3051: 3050: 3049: 3044: 3034: 3033: 3032: 3022: 3021: 3020: 3010: 3005: 3000: 2994: 2992: 2982: 2981: 2969: 2968: 2965: 2964: 2961: 2960: 2958: 2957: 2952: 2947: 2942: 2936: 2934: 2928: 2927: 2925: 2924: 2919: 2914: 2908: 2906: 2902: 2901: 2899: 2898: 2893: 2888: 2883: 2878: 2873: 2868: 2862: 2860: 2854: 2853: 2851: 2850: 2848:Standard error 2845: 2840: 2835: 2834: 2833: 2828: 2817: 2815: 2809: 2808: 2806: 2805: 2800: 2795: 2790: 2785: 2780: 2778:Optimal design 2775: 2770: 2764: 2762: 2752: 2751: 2739: 2738: 2735: 2734: 2731: 2730: 2728: 2727: 2722: 2717: 2712: 2707: 2702: 2697: 2692: 2687: 2682: 2677: 2672: 2667: 2662: 2657: 2651: 2649: 2643: 2642: 2640: 2639: 2634: 2633: 2632: 2627: 2617: 2612: 2606: 2604: 2598: 2597: 2595: 2594: 2589: 2584: 2578: 2576: 2575:Summary tables 2572: 2571: 2569: 2568: 2562: 2560: 2554: 2553: 2550: 2549: 2547: 2546: 2545: 2544: 2539: 2534: 2524: 2518: 2516: 2510: 2509: 2507: 2506: 2501: 2496: 2491: 2486: 2481: 2476: 2470: 2468: 2462: 2461: 2459: 2458: 2453: 2448: 2447: 2446: 2441: 2436: 2431: 2426: 2421: 2416: 2411: 2409:Contraharmonic 2406: 2401: 2390: 2388: 2379: 2369: 2368: 2356: 2355: 2353: 2352: 2347: 2341: 2338: 2337: 2330: 2329: 2322: 2315: 2307: 2301: 2300: 2291: 2281: 2269: 2268: 2235: 2216: 2215: 2213: 2210: 2209: 2208: 2202: 2195: 2192: 2191: 2190: 2185: 2180: 2175: 2169: 2162: 2159: 2158: 2157: 2150:sample maximum 2142: 2141: 2140: 2129: 2126: 2123: 2120: 2115: 2111: 2108: 2105: 2089: 2088: 2065: 2064: 2063: 2052: 2028: 2027:Other examples 2025: 2017: 2016: 2003: 1997: 1993: 1987: 1984: 1980: 1976: 1973: 1970: 1967: 1964: 1958: 1953: 1948: 1944: 1938: 1934: 1930: 1925: 1918: 1913: 1909: 1902: 1898: 1894: 1891: 1888: 1885: 1882: 1879: 1876: 1873: 1870: 1867: 1864: 1861: 1858: 1855: 1852: 1849: 1846: 1843: 1820: 1815: 1812: 1808: 1804: 1801: 1798: 1795: 1792: 1789: 1786: 1764: 1759: 1755: 1749: 1746: 1743: 1740: 1737: 1723: 1722: 1707: 1703: 1699: 1694: 1691: 1686: 1682: 1678: 1675: 1672: 1658: 1657: 1642: 1638: 1634: 1629: 1626: 1623: 1620: 1617: 1614: 1610: 1605: 1602: 1597: 1594: 1591: 1588: 1585: 1582: 1555: 1535: 1530: 1527: 1523: 1519: 1516: 1513: 1510: 1507: 1504: 1501: 1487: 1486: 1475: 1472: 1469: 1466: 1463: 1460: 1457: 1454: 1449: 1446: 1442: 1438: 1435: 1432: 1429: 1426: 1423: 1420: 1417: 1414: 1411: 1403: 1400: 1396: 1392: 1389: 1383: 1380: 1376: 1359: 1358: 1343: 1339: 1335: 1330: 1327: 1324: 1321: 1318: 1304: 1303: 1287: 1284: 1281: 1277: 1271: 1268: 1264: 1260: 1257: 1254: 1247: 1244: 1240: 1236: 1230: 1227: 1224: 1221: 1216: 1212: 1187: 1170: 1167: 1163:estimator bias 1155: 1154: 1138: 1134: 1130: 1127: 1124: 1121: 1118: 1115: 1112: 1109: 1106: 1103: 1100: 1097: 1094: 1091: 1088: 1085: 1082: 1079: 1052: 1049: 1022: 1019: 1016: 1013: 1010: 999: 998: 986: 983: 980: 977: 972: 968: 964: 961: 958: 953: 949: 945: 940: 936: 932: 929: 926: 923: 920: 917: 914: 909: 905: 901: 898: 895: 890: 886: 882: 877: 873: 869: 866: 843: 823: 820: 817: 814: 794: 789: 785: 781: 778: 775: 770: 766: 762: 757: 753: 749: 746: 712: 709: 706: 703: 698: 694: 662: 659: 656: 653: 631: 625: 622: 608: 607: 596: 593: 588: 584: 580: 577: 574: 569: 565: 561: 556: 552: 548: 542: 539: 533: 530: 527: 524: 521: 518: 513: 509: 505: 502: 499: 494: 490: 486: 481: 477: 473: 470: 467: 464: 461: 438: 435: 432: 429: 405: 402: 399: 396: 376: 371: 367: 363: 360: 357: 352: 348: 344: 339: 335: 331: 328: 308: 288: 285: 282: 279: 274: 270: 247: 243: 239: 236: 233: 228: 224: 220: 215: 211: 201:based on data 190: 187: 184: 181: 169: 166: 128: 127: 42: 40: 33: 26: 9: 6: 4: 3: 2: 4651: 4640: 4637: 4636: 4634: 4619: 4618: 4609: 4607: 4606: 4597: 4595: 4594: 4589: 4583: 4581: 4580: 4571: 4570: 4567: 4553: 4550: 4548: 4547:Geostatistics 4545: 4543: 4540: 4538: 4535: 4533: 4530: 4529: 4527: 4525: 4521: 4515: 4514:Psychometrics 4512: 4510: 4507: 4505: 4502: 4500: 4497: 4495: 4492: 4490: 4487: 4485: 4482: 4480: 4477: 4475: 4472: 4470: 4467: 4466: 4464: 4462: 4458: 4452: 4449: 4447: 4444: 4442: 4438: 4435: 4433: 4430: 4428: 4425: 4423: 4420: 4419: 4417: 4415: 4411: 4405: 4402: 4400: 4397: 4395: 4391: 4388: 4386: 4383: 4382: 4380: 4378: 4377:Biostatistics 4374: 4370: 4366: 4361: 4357: 4339: 4338:Log-rank test 4336: 4335: 4333: 4329: 4323: 4320: 4319: 4317: 4315: 4311: 4305: 4302: 4300: 4297: 4295: 4292: 4290: 4287: 4286: 4284: 4282: 4278: 4275: 4273: 4269: 4259: 4256: 4254: 4251: 4249: 4246: 4244: 4241: 4239: 4236: 4235: 4233: 4231: 4227: 4221: 4218: 4216: 4213: 4211: 4209:(Box–Jenkins) 4205: 4203: 4200: 4198: 4195: 4191: 4188: 4187: 4186: 4183: 4182: 4180: 4178: 4174: 4168: 4165: 4163: 4162:Durbin–Watson 4160: 4158: 4152: 4150: 4147: 4145: 4144:Dickey–Fuller 4142: 4141: 4139: 4135: 4129: 4126: 4124: 4121: 4119: 4118:Cointegration 4116: 4114: 4111: 4109: 4106: 4104: 4101: 4099: 4096: 4094: 4093:Decomposition 4091: 4090: 4088: 4084: 4081: 4079: 4075: 4065: 4062: 4061: 4060: 4057: 4056: 4055: 4052: 4048: 4045: 4044: 4043: 4040: 4038: 4035: 4033: 4030: 4028: 4025: 4023: 4020: 4018: 4015: 4013: 4010: 4008: 4005: 4004: 4002: 4000: 3996: 3990: 3987: 3985: 3982: 3980: 3977: 3975: 3972: 3970: 3967: 3965: 3964:Cohen's kappa 3962: 3961: 3959: 3957: 3953: 3949: 3945: 3941: 3937: 3933: 3928: 3924: 3910: 3907: 3905: 3902: 3900: 3897: 3895: 3892: 3891: 3889: 3887: 3883: 3877: 3873: 3869: 3863: 3861: 3858: 3857: 3855: 3853: 3849: 3843: 3840: 3838: 3835: 3833: 3830: 3828: 3825: 3823: 3820: 3818: 3817:Nonparametric 3815: 3813: 3810: 3809: 3807: 3803: 3797: 3794: 3792: 3789: 3787: 3784: 3782: 3779: 3778: 3776: 3774: 3770: 3764: 3761: 3759: 3756: 3754: 3751: 3749: 3746: 3744: 3741: 3740: 3738: 3736: 3732: 3726: 3723: 3721: 3718: 3716: 3713: 3711: 3708: 3707: 3705: 3703: 3699: 3695: 3688: 3685: 3683: 3680: 3679: 3675: 3671: 3655: 3652: 3651: 3650: 3647: 3645: 3642: 3640: 3637: 3633: 3630: 3628: 3625: 3624: 3623: 3620: 3619: 3617: 3615: 3611: 3601: 3598: 3594: 3588: 3586: 3580: 3578: 3572: 3571: 3570: 3567: 3566:Nonparametric 3564: 3562: 3556: 3552: 3549: 3548: 3547: 3541: 3537: 3536:Sample median 3534: 3533: 3532: 3529: 3528: 3526: 3524: 3520: 3512: 3509: 3507: 3504: 3502: 3499: 3498: 3497: 3494: 3492: 3489: 3487: 3481: 3479: 3476: 3474: 3471: 3469: 3466: 3464: 3461: 3459: 3457: 3453: 3451: 3448: 3447: 3445: 3443: 3439: 3433: 3431: 3427: 3425: 3423: 3418: 3416: 3411: 3407: 3406: 3403: 3400: 3398: 3394: 3384: 3381: 3379: 3376: 3374: 3371: 3370: 3368: 3366: 3362: 3356: 3353: 3349: 3346: 3345: 3344: 3341: 3337: 3334: 3333: 3332: 3329: 3327: 3324: 3323: 3321: 3319: 3315: 3307: 3304: 3302: 3299: 3298: 3297: 3294: 3292: 3289: 3287: 3284: 3282: 3279: 3277: 3274: 3272: 3269: 3268: 3266: 3264: 3260: 3254: 3251: 3247: 3244: 3240: 3237: 3235: 3232: 3231: 3230: 3227: 3226: 3225: 3222: 3218: 3215: 3213: 3210: 3208: 3205: 3203: 3200: 3199: 3198: 3195: 3194: 3192: 3190: 3186: 3183: 3181: 3177: 3171: 3168: 3166: 3163: 3159: 3156: 3155: 3154: 3151: 3149: 3146: 3142: 3141:loss function 3139: 3138: 3137: 3134: 3130: 3127: 3125: 3122: 3120: 3117: 3116: 3115: 3112: 3110: 3107: 3105: 3102: 3098: 3095: 3093: 3090: 3088: 3082: 3079: 3078: 3077: 3074: 3070: 3067: 3065: 3062: 3060: 3057: 3056: 3055: 3052: 3048: 3045: 3043: 3040: 3039: 3038: 3035: 3031: 3028: 3027: 3026: 3023: 3019: 3016: 3015: 3014: 3011: 3009: 3006: 3004: 3001: 2999: 2996: 2995: 2993: 2991: 2987: 2983: 2979: 2974: 2970: 2956: 2953: 2951: 2948: 2946: 2943: 2941: 2938: 2937: 2935: 2933: 2929: 2923: 2920: 2918: 2915: 2913: 2910: 2909: 2907: 2903: 2897: 2894: 2892: 2889: 2887: 2884: 2882: 2879: 2877: 2874: 2872: 2869: 2867: 2864: 2863: 2861: 2859: 2855: 2849: 2846: 2844: 2843:Questionnaire 2841: 2839: 2836: 2832: 2829: 2827: 2824: 2823: 2822: 2819: 2818: 2816: 2814: 2810: 2804: 2801: 2799: 2796: 2794: 2791: 2789: 2786: 2784: 2781: 2779: 2776: 2774: 2771: 2769: 2766: 2765: 2763: 2761: 2757: 2753: 2749: 2744: 2740: 2726: 2723: 2721: 2718: 2716: 2713: 2711: 2708: 2706: 2703: 2701: 2698: 2696: 2693: 2691: 2688: 2686: 2683: 2681: 2678: 2676: 2673: 2671: 2670:Control chart 2668: 2666: 2663: 2661: 2658: 2656: 2653: 2652: 2650: 2648: 2644: 2638: 2635: 2631: 2628: 2626: 2623: 2622: 2621: 2618: 2616: 2613: 2611: 2608: 2607: 2605: 2603: 2599: 2593: 2590: 2588: 2585: 2583: 2580: 2579: 2577: 2573: 2567: 2564: 2563: 2561: 2559: 2555: 2543: 2540: 2538: 2535: 2533: 2530: 2529: 2528: 2525: 2523: 2520: 2519: 2517: 2515: 2511: 2505: 2502: 2500: 2497: 2495: 2492: 2490: 2487: 2485: 2482: 2480: 2477: 2475: 2472: 2471: 2469: 2467: 2463: 2457: 2454: 2452: 2449: 2445: 2442: 2440: 2437: 2435: 2432: 2430: 2427: 2425: 2422: 2420: 2417: 2415: 2412: 2410: 2407: 2405: 2402: 2400: 2397: 2396: 2395: 2392: 2391: 2389: 2387: 2383: 2380: 2378: 2374: 2370: 2366: 2361: 2357: 2351: 2348: 2346: 2343: 2342: 2339: 2335: 2328: 2323: 2321: 2316: 2314: 2309: 2308: 2305: 2297: 2292: 2290: 2286: 2282: 2278: 2273: 2272: 2264: 2260: 2254: 2246: 2242: 2238: 2232: 2228: 2221: 2217: 2206: 2203: 2201: 2198: 2197: 2189: 2186: 2184: 2181: 2179: 2176: 2173: 2170: 2168: 2165: 2164: 2155: 2151: 2147: 2143: 2127: 2124: 2121: 2118: 2113: 2109: 2106: 2103: 2093: 2092: 2091: 2090: 2086: 2082: 2078: 2074: 2070: 2066: 2061: 2057: 2053: 2050: 2046: 2043:However, the 2042: 2041: 2039: 2035: 2031: 2030: 2024: 2022: 2001: 1995: 1985: 1982: 1978: 1974: 1971: 1965: 1962: 1956: 1951: 1946: 1942: 1936: 1932: 1928: 1923: 1916: 1911: 1907: 1896: 1892: 1886: 1880: 1877: 1871: 1865: 1859: 1853: 1847: 1841: 1834: 1833: 1832: 1813: 1810: 1806: 1802: 1799: 1793: 1790: 1787: 1784: 1762: 1757: 1753: 1747: 1741: 1735: 1726: 1705: 1701: 1697: 1692: 1684: 1680: 1673: 1663: 1662: 1661: 1640: 1636: 1632: 1627: 1621: 1615: 1612: 1608: 1603: 1600: 1595: 1589: 1583: 1573: 1572: 1571: 1569: 1553: 1528: 1525: 1521: 1517: 1514: 1508: 1505: 1502: 1499: 1492: 1467: 1461: 1458: 1455: 1447: 1444: 1440: 1436: 1433: 1427: 1424: 1421: 1418: 1412: 1409: 1401: 1398: 1394: 1390: 1387: 1381: 1378: 1374: 1364: 1363: 1362: 1341: 1337: 1333: 1328: 1322: 1316: 1309: 1308: 1307: 1285: 1282: 1279: 1269: 1266: 1262: 1258: 1255: 1245: 1242: 1238: 1234: 1228: 1222: 1214: 1210: 1202: 1201: 1200: 1199:with density 1176: 1166: 1164: 1160: 1136: 1125: 1119: 1116: 1110: 1104: 1098: 1095: 1092: 1086: 1080: 1077: 1070: 1069: 1068: 1066: 1062: 1058: 1048: 1046: 1042: 1038: 1033: 1020: 1014: 1008: 981: 978: 970: 966: 962: 959: 956: 951: 947: 943: 938: 934: 927: 921: 915: 907: 903: 899: 896: 893: 888: 884: 880: 875: 871: 864: 857: 856: 855: 841: 818: 812: 787: 783: 779: 776: 773: 768: 764: 760: 755: 751: 744: 735: 733: 728: 726: 707: 704: 701: 696: 692: 683: 680: 676: 657: 651: 642: 629: 620: 586: 582: 578: 575: 572: 567: 563: 559: 554: 550: 537: 528: 525: 522: 511: 507: 503: 500: 497: 492: 488: 484: 479: 475: 468: 462: 459: 452: 451: 450: 433: 430: 419: 400: 394: 369: 365: 361: 358: 355: 350: 346: 342: 337: 333: 326: 283: 280: 277: 272: 268: 245: 241: 237: 234: 231: 226: 222: 218: 213: 209: 185: 179: 165: 162: 158: 153: 149: 147: 143: 139: 135: 124: 121: 113: 110:November 2009 102: 99: 95: 92: 88: 85: 81: 78: 74: 71: â€“  70: 66: 65:Find sources: 59: 55: 49: 48: 43:This article 41: 37: 32: 31: 19: 4615: 4603: 4584: 4577: 4489:Econometrics 4439: / 4422:Chemometrics 4399:Epidemiology 4392: / 4365:Applications 4207:ARIMA model 4154:Q-statistic 4103:Stationarity 3999:Multivariate 3942: / 3938: / 3936:Multivariate 3934: / 3874: / 3870: / 3644:Bayes factor 3543:Signed rank 3455: 3429: 3421: 3409: 3228: 3104:Completeness 2940:Cohort study 2838:Opinion poll 2773:Missing data 2760:Study design 2715:Scatter plot 2637:Scatter plot 2630:Spearman's ρ 2592:Grouped data 2295: 2284: 2276: 2226: 2220: 2156:for details. 2145: 2084: 2080: 2076: 2068: 2018: 1727: 1724: 1659: 1488: 1360: 1305: 1172: 1158: 1156: 1064: 1054: 1039:analog is a 1034: 1000: 736: 729: 724: 643: 609: 417: 171: 157:unbiasedness 154: 150: 141: 137: 131: 116: 107: 97: 90: 83: 76: 64: 52:Please help 47:verification 44: 4617:WikiProject 4532:Cartography 4494:Jurimetrics 4446:Reliability 4177:Time domain 4156:(Ljung–Box) 4078:Time-series 3956:Categorical 3940:Time-series 3932:Categorical 3867:(Bernoulli) 3702:Correlation 3682:Correlation 3478:Jarque–Bera 3450:Chi-squared 3212:M-estimator 3165:Asymptotics 3109:Sufficiency 2876:Interaction 2788:Replication 2768:Effect size 2725:Violin plot 2705:Radar chart 2685:Forest plot 2675:Correlogram 2625:Kendall's τ 2188:U-statistic 2034:sample mean 1660:Therefore, 834:, and that 4484:Demography 4202:ARMA model 4007:Regression 3584:(Friedman) 3545:(Wilcoxon) 3483:Normality 3473:Lilliefors 3420:Student's 3296:Resampling 3170:Robustness 3158:divergence 3148:Efficiency 3086:(monotone) 3081:Likelihood 2998:Population 2831:Stratified 2783:Population 2602:Dependence 2558:Count data 2489:Percentile 2466:Dispersion 2399:Arithmetic 2334:Statistics 2236:0824782534 2212:References 682:sufficient 168:Definition 134:statistics 80:newspapers 4639:Estimator 3865:Logistic 3632:posterior 3558:Rank sum 3306:Jackknife 3301:Bootstrap 3119:Bootstrap 3054:Parameter 3003:Statistic 2798:Statistic 2710:Run chart 2695:Pie chart 2690:Histogram 2680:Fan chart 2655:Bar chart 2537:L-moments 2424:Geometric 2253:cite book 2122:− 2060:mid-range 1983:− 1966:⁡ 1893:⁡ 1878:∣ 1866:δ 1860:⁡ 1842:η 1811:− 1794:⁡ 1736:δ 1702:θ 1674:⁡ 1637:θ 1616:⁡ 1604:θ 1584:⁡ 1526:− 1509:⁡ 1468:θ 1462:⁡ 1445:− 1428:⁡ 1422:θ 1419:− 1413:⁡ 1399:− 1379:− 1338:θ 1323:θ 1280:θ 1267:− 1243:− 1235:θ 1215:θ 1126:δ 1120:⁡ 1105:δ 1099:⁡ 1087:δ 1081:⁡ 1015:θ 979:∣ 960:… 928:δ 922:⁡ 897:… 865:η 819:θ 777:… 745:δ 711:Ω 708:∈ 705:θ 697:θ 658:θ 624:~ 621:δ 576:… 541:~ 538:δ 529:⁡ 523:≤ 501:… 469:δ 463:⁡ 437:Ω 434:∈ 431:θ 428:∀ 401:θ 359:… 327:δ 307:Ω 287:Ω 284:∈ 281:θ 273:θ 235:… 186:θ 4633:Category 4579:Category 4272:Survival 4149:Johansen 3872:Binomial 3827:Isotonic 3414:(normal) 3059:location 2866:Blocking 2821:Sampling 2700:Q–Q plot 2665:Box plot 2647:Graphics 2542:Skewness 2532:Kurtosis 2504:Variance 2434:Heronian 2429:Harmonic 2245:21523971 2161:See also 2023:states. 1728:Clearly 1047:(MMSE). 1037:Bayesian 679:complete 299:, where 161:variance 4605:Commons 4552:Kriging 4437:Process 4394:studies 4253:Wavelet 4086:General 3253:Plug-in 3047:L space 2826:Cluster 2527:Moments 2345:Outline 2148:is the 1169:Example 94:scholar 4474:Census 4064:Normal 4012:Manova 3832:Robust 3582:2-way 3574:1-way 3412:-test 3083:  2660:Biplot 2451:Median 2444:Lehmer 2386:Center 2243:  2233:  2207:(MMSE) 2174:(BLUE) 2144:where 1142:  144:is an 96:  89:  82:  75:  67:  4098:Trend 3627:prior 3569:anova 3458:-test 3432:-test 3424:-test 3331:Power 3276:Pivot 3069:shape 3064:scale 2514:Shape 2494:Range 2439:Heinz 2414:Cubic 2350:Index 418:UMVUE 101:JSTOR 87:books 4331:Test 3531:Sign 3383:Wald 2456:Mode 2394:Mean 2263:link 2259:link 2241:OCLC 2231:ISBN 1117:bias 73:news 3511:BIC 3506:AIC 2067:If 1963:log 1791:log 1613:var 1506:log 1459:log 1425:log 1410:exp 1177:on 1096:var 1078:MSE 1067:is 1055:An 725:any 526:var 460:var 420:if 416:is 387:of 140:or 132:In 56:by 4635:: 2255:}} 2251:{{ 2239:. 2087:is 1165:. 1035:A 449:, 136:a 3456:G 3430:F 3422:t 3410:Z 3129:V 3124:U 2326:e 2319:t 2312:v 2265:) 2247:. 2146:m 2128:, 2125:1 2119:m 2114:k 2110:1 2107:+ 2104:k 2085:N 2081:N 2077:N 2069:k 2051:. 2002:2 1996:2 1992:) 1986:X 1979:e 1975:+ 1972:1 1969:( 1957:= 1952:2 1947:2 1943:T 1937:= 1933:) 1929:T 1924:| 1917:2 1912:2 1908:T 1897:( 1890:E 1887:= 1884:) 1881:T 1875:) 1872:X 1869:( 1863:( 1857:E 1854:= 1851:) 1848:X 1845:( 1819:) 1814:x 1807:e 1803:+ 1800:1 1797:( 1788:= 1785:T 1763:2 1758:2 1754:T 1748:= 1745:) 1742:X 1739:( 1706:2 1698:2 1693:= 1690:) 1685:2 1681:T 1677:( 1671:E 1641:2 1633:1 1628:= 1625:) 1622:T 1619:( 1609:, 1601:1 1596:= 1593:) 1590:T 1587:( 1581:E 1554:T 1534:) 1529:x 1522:e 1518:+ 1515:1 1512:( 1503:= 1500:T 1474:) 1471:) 1465:( 1456:+ 1453:) 1448:x 1441:e 1437:+ 1434:1 1431:( 1416:( 1402:x 1395:e 1391:+ 1388:1 1382:x 1375:e 1342:2 1334:1 1329:= 1326:) 1320:( 1317:g 1286:1 1283:+ 1276:) 1270:x 1263:e 1259:+ 1256:1 1253:( 1246:x 1239:e 1229:= 1226:) 1223:x 1220:( 1211:p 1186:R 1137:2 1133:] 1129:) 1123:( 1114:[ 1111:+ 1108:) 1102:( 1093:= 1090:) 1084:( 1065:ÎŽ 1021:. 1018:) 1012:( 1009:g 985:) 982:T 976:) 971:n 967:X 963:, 957:, 952:2 948:X 944:, 939:1 935:X 931:( 925:( 919:E 916:= 913:) 908:n 904:X 900:, 894:, 889:2 885:X 881:, 876:1 872:X 868:( 842:T 822:) 816:( 813:g 793:) 788:n 784:X 780:, 774:, 769:2 765:X 761:, 756:1 752:X 748:( 702:, 693:p 661:) 655:( 652:g 630:. 595:) 592:) 587:n 583:X 579:, 573:, 568:2 564:X 560:, 555:1 551:X 547:( 532:( 520:) 517:) 512:n 508:X 504:, 498:, 493:2 489:X 485:, 480:1 476:X 472:( 466:( 404:) 398:( 395:g 375:) 370:n 366:X 362:, 356:, 351:2 347:X 343:, 338:1 334:X 330:( 278:, 269:p 246:n 242:X 238:, 232:, 227:2 223:X 219:, 214:1 210:X 189:) 183:( 180:g 123:) 117:( 112:) 108:( 98:· 91:· 84:· 77:· 50:. 20:)

Index

Minimum variance unbiased estimator

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unbiased estimator
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