A chi-square goodness of fit test is to be performed to see if data fit the Poisson distribution.There are 8 categories, and lambda must be estimated.How many degrees of freedom should be used?
A)8
B)7
C)6
D)5
E)4

Question

Quizplus · Accepted Answer

The degrees of freedom for a chi-square goodness of fit test are calculated as the number of categories minus one minus the number of parameters estimated from the data. Here, there are 8 categories and 1 parameter (lambda) estimated, so the degrees of freedom are 8 - 1 - 1 = 6.

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