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relationship between illness and vaccination, if it is observed that where the incidence of one is higher than average, the incidence of the other tends to be lower than average. Similarly, there would be a negative
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relationship between illness and vaccination if it is observed in one location that times with a higher-than-average incidence of one tend to coincide with a lower-than-average incidence of the other.
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between two variables if higher values of one variable tend to be associated with lower values of the other. A negative relationship between two variables usually implies that the
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of the arc of separation of the points on the sphere. When this arc is more than a quarter-circle (θ > π/2), then the cosine is negative.
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points represent a correlation of –1 = cos(π). Any two points not in the same hemisphere have negative correlation.
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and as well for negative real numbers. Thus the slope is everywhere negative except at the
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between them is negative, or — what is in some contexts equivalent — that the
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Negative correlation can be seen geometrically when two normalized
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31:When 3π /2 > θ > π /2 , then cos(θ) < 0.
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276:{\displaystyle \ y\prime ={\frac {-k}{x^{2}}}\ }
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331:Independence (probability theory)
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59:between variables is also called
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212:Understanding Correlation
312:Testing for correlation
103:inverse proportionality
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132:{\displaystyle y=k/x}
84:Diametrically opposed
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216:University of Hawaii
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192:Diminishing returns
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292:singularity
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186:See also
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