Which of the following conditions is needed regarding the chi-squared test statistic for the test of variance?
a. The population random variable must be normal.
b. The test statistic must be a non-negative number.
c. The test statistic must have a chi-squared distribution with n - 1 degrees of freedom.
d. All of these choices are true.
Question 2
The test statistic Fr for the Friedman test has what distribution?
a. approximate normal distribution
b. approximate chi-squared distribution
c. F-distribution
d. None of these choices.
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