Author Question: The statistic (n - 1)s2 / 2 has a chi-squared distribution with n - 1 degrees of freedom if: a. the ... (Read 57 times)

theo · **on:** Jun 24, 2018

The statistic (n - 1)s2 / 2 has a chi-squared distribution with n - 1 degrees of freedom if:
a. the sample has a Student t-distribution with degrees of freedom equal to n - 1.
b. the sample is normally distributed with variance equal to s2.
c. the population is normally distributed with variance equal to 2.
d. All of these choices are true.

Question 2

To apply the Friedman test to determine whether the locations of two or more populations are the same, the samples must be:
a. from a randomized block experiment.
b. from normal populations.
c. independent.
d. All of these choices are true.