i. The sum of the expected frequencies and the sum of the observed frequencies must be equal.
ii. If the computed value of chi-square is less than the critical value, reject the null hypothesis at a predetermined level of significance.
Iii) If there are only two cells in a goodness-of-fit test, we should expect 5 or more frequencies.
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. The sum of the expected frequencies and the sum of the observed frequencies must be equal. 
ii. If the computed value of chi-square is less than the critical value, reject the null hypothesis at a predetermined level of significance.
Iii) If there are only two cells in a goodness-of-fit test, we should expect 5 or more frequencies.
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

The sum of expected and observed frequencies must be equal (i is correct). If the chi-square value is less than the critical value, we fail to reject the null hypothesis (ii is incorrect). For a goodness-of-fit test, each expected frequency should be 5 or more (iii is correct).

I the Sum of the Expected Frequencies and the Sum