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

Question

Quizplus · Accepted Answer

For a goodness-of-fit test with k categories and estimated parameter(s), the degrees of freedom is equal to (k-1) minus the number of estimated parameters. In this case, there are 8 categories and 1 estimated parameter (λ), so the degrees of freedom would be (8-1)-1=6. Therefore, the correct choice is C)6.

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