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

Question

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

Quizplus · Accepted Answer

For a goodness-of-fit test, the degrees of freedom is k - 1, not k - 2. The sum of expected frequencies should equal the sum of observed frequencies. If the computed chi-square is less than the critical value, we fail to reject the null hypothesis.

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