I the Number of Degrees of Freedom Appropriate for the Chi-Square

Multiple Choice

i. The number of degrees of freedom appropriate for the chi-square goodness-of-fit test is the number of categories minus 2.
Ii) If there are extremely large differences between observed and expected frequencies the correct decision is to reject H0.
Iii) There are 2 degrees of freedom for a contingency table classifying three levels of income with each gender.

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