A chi-square goodness-of-fit test is to be performed to see if data fit the Poisson distribution. There are 6 categories, and λ 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 with a Poisson distribution, the degrees of freedom is calculated as the number of categories minus the number of estimated parameters, which in this case is λ. Therefore, the degrees of freedom in this test would be 6 - 1 = 5. Therefore, the best choice is B.

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