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

Quizplus · Accepted Answer

All the conditions listed are necessary for the chi-squared test statistic in the context of testing variance. The population must be normally distributed (A), the chi-squared statistic is always non-negative (B), and it follows a chi-squared distribution with n - 1 degrees of freedom, where n is the sample size (C).

Which of the Following Conditions Is Needed Regarding the Chi-Squared