The standard deviation is equal to the square root of
A) the variance.
B) the sum of squared deviations from the mean.
C) N - 1.
D) the standard error of the mean.

Question

Quizplus · Accepted Answer

The standard deviation is defined as the square root of the variance, which is the average of the squared deviations from the mean. Therefore, choice A is the correct answer. Choice B is the definition of the variance, not the standard deviation. Choice C is unrelated to the calculation of the standard deviation. Choice D refers to the standard error of the mean, which is a measure of the variability of sample means, not individual values, and is calculated differently from the standard deviation.

The Standard Deviation Is Equal to the Square Root of