Which of the following has a mean and variance that depend on degrees of freedom?

Question

Quizplus · Accepted Answer

All of the given options have mean and variance that depend on degrees of freedom. For Student t distribution, both mean and variance depend on degrees of freedom; for chi-squared distributions, mean depends on degrees of freedom and variance is twice the degrees of freedom; and for F distribution, mean and variance both depend on the degrees of freedom. Therefore, the correct answer is D, i.e., All of these choices are true.

Which of the Following Has a Mean and Variance That