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

Question

Quizplus · Accepted Answer

The degrees of freedom for a chi-square goodness-of-fit test are calculated as the number of categories minus 1 minus the number of parameters estimated from the data. Here, with 5 categories and 1 parameter (λ) estimated, the degrees of freedom are 5 - 1 - 1 = 3.

A Chi-Square Goodness-Of-Fit-Test Is to Be Performed to See If