Problema Solution
Which of the following statements is NOT true?
A. The variance is a measure of the dispersion or spread of a distribution about its mean.
B. The standard deviation is the square root of the variance.
C. If all of the data values in a data set are identical, then the standard deviation is 0.
D. The variance can be a negative number.
Answer provided by our tutors
All the other options are true, hence the correct answer is D. For any data set, the variance is never negative.