Home › AP EAPCET (Engineering) › Mathematics › Statistics › If the variance of a data set is 49, its standar…
If the variance of a data set is 49, its standard deviation is
A7
B24.5
C2401
D49
Answer & Solution
Correct answer: A. 7
Standard deviation is the positive square root of variance, and the root of 49 is 7.
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