For a chi-square test for goodness-of-fit, what must be true to receive empirical support for the research hypothesis?
A) We need at least 20 observations per cell.
B) We are actually hoping for a bad fit between the observed data and what we expect according to the null hypothesis.
C) The null hypothesis must be retained.
D) We are actually hoping for a good fit between the observed data and what we expect according to the null hypothesis.

Question

Quizplus · Accepted Answer

For a chi-square test for goodness-of-fit, empirical support for the research hypothesis is found when there is a significant difference between the observed data and the expected data under the null hypothesis. This means we are hoping for a bad fit between the observed data and what we expect according to the null hypothesis, indicating that the observed data do not conform to the expected distribution, thus supporting the research hypothesis over the null.

For a Chi-Square Test for Goodness-Of-Fit, What Must Be True