The chi-square goodness of fit test will be valid if the average of the expected cell frequencies is ______________.
A)Greater than 0
B)Less than 5
C)Between 0 and 5
D)At least 1
E)At least 5

Question

Quizplus · Accepted Answer

The chi-square goodness of fit test assumes that the expected cell frequencies are at least 5. This ensures that the chi-square distribution accurately approximates the true distribution of the test statistic. If the expected frequencies are less than 5, then the test may be unreliable and the results may not be valid. Therefore, the best choice is E, which indicates that the average of the expected cell frequencies is at least 5.

The Chi-Square Goodness of Fit Test Will Be Valid If