Home › AP EAPCET (Engineering) › Mathematics › Statistics › Variance of a set of observations is defined as …
Variance of a set of observations is defined as the mean of the
Aabsolute deviations from median
Bdeviations taken from the mode
Csum of all the observations
Dsquares of deviations from mean
Answer & Solution
Correct answer: D. squares of deviations from mean
Squaring the deviations from the mean and averaging them gives the variance.
Related questions
A set has 8 equal observations. Its variance and range areVariance is the mean of squared deviations, whereas standard deviation isPopulation standard deviation of 2, 4, 4, 4, 5, 5, 7, 9 isWhy is range only a rough measure of dispersion?With Q1 = 20 and Q3 = 45, the quartile deviation (half the IQR) isFor the interquartile range, if Q1 = 20 and Q3 = 45, the IQR isWhy is the plain sum of squared deviations a poor dispersion measure for sets of unequal sThe sum of squared deviations of 5, 15, 25, 35, 45, 55 from their mean 30 is 1750. The var