Which of the Following Best Describes the Sampling Distribution of the Test

Multiple Choice

Which of the following best describes the sampling distribution of the test statistic for a goodness-of-fit test with k categories?

A) Student t-distribution with k - 1 degrees of freedom.
B) Normal distribution.
C) Chi-squared distribution with k - 1 degrees of freedom.
D) Approximately Chi-squared distribution with k - 1 degrees of freedom.