Which of the following statements is true for the chi-squared tests?
A)Testing for equal proportions is identical to testing for goodness-of-fit.
B)The number of degrees of freedom in a test of a contingency table with r rows and c columns is (r - 1)(c - 1).
C)The number of degrees of freedom in a goodness-of-fit test with k categories is k - 1.
D)All of these choices are correct.

Question

Quizplus · Accepted Answer

A) Testing for equal proportions and testing for goodness-of-fit are based on the same chi-squared statistic and have the same formula, so this statement is true.
B) The number of degrees of freedom in a contingency table test is calculated using (r - 1)(c - 1), so this statement is true.
C) The number of degrees of freedom in a goodness-of-fit test is equal to the number of categories minus one, so this statement is also true.
Therefore, all three statements are correct, so the answer is D.

Which of the Following Statements Is True for the Chi-Squared