Statistics question

Question

In a chi-square goodness of fit test of, the number of degrees of freedom equals the:

a. number of observations minus one.

b. number of sample observations minus the missing observations.

c. number of rows minus one times the number of columns minus one.

d. number of categories minus one.

Answer 1

Unless you have more information in the question, the answer should be (d).

Other situations have different degrees of freedom.

What was meant to come after "test of"? Or should this "of" be deleted? That's what I presumed.