The shape of the chi-squared distribution depends on:

A) the population variance
B) the number of its degrees of freedom
C) the population mean
D) all of these
E) none of these

The shape of the chi-squared distribution depends only on the number of its degrees of freedom. It is a theoretical distribution that models the sum of squared deviations from the mean, and its shape changes depending on the degrees of freedom. The population variance and mean do not directly affect the shape of this distribution.