14. Carry out a chi-square test for goodness of fit for each of the following studies

(use the .05 level for each). In each situation, the observed numbers are shown;

the expected numbers are equal across categories.

(a) Category I, 20; Category II, 20; Category III, 60.

(b) Category I, 20; Category II, 20; Category III, 20; Category IV, 60.

(c) Category I, 20; Category II, 20; Category III, 20; Category IV, 20; Category V, 60.