I for a Goodness-Of-Fit Test, the Number of Degrees of Freedom

Multiple Choice

i. For a goodness-of-fit test, the number of degrees of freedom is determined by k - 2, where k is the number of categories.
ii. The sum of the expected frequencies in a goodness-of-fit test need not equal the sum of the observed frequencies.
Iii) If the computed value of chi-square is less than the critical value, reject the null hypothesis at a predetermined level of significance.

A) (i) , (ii) and (iii) are all correct statements
B) (i) and (ii) are correct statements, but not (iii) .
C) (i) and (iii) are correct statements but not (ii) .
D) (ii) and (iii) are correct statements but not (i) .
E) All statements are false