A chi-square goodness of fit test is to be performed to see if data fit the Poisson distribution.There are 6 categories, and lambda must be estimated.How many degrees of freedom should be used?
A)6
B)5
C)4
D)3
E)2

Question

Quizplus · Accepted Answer

For a chi-square goodness of fit test, the degrees of freedom are calculated as the number of categories minus one minus the number of parameters estimated from the data. Here, there are 6 categories and 1 parameter (lambda) estimated, so the degrees of freedom are 6 - 1 - 1 = 4.

A Chi-Square Goodness of Fit Test Is to Be Performed