Is someone who switches brands because of a financial inducement less likely to remain loyal than someone who switches without inducement? Let p1 and p2 denote the true proportions of switchers to a certain brand with and without inducement, respectively, who subsequently make a repeat purchase. Test H0: p1  p2
0 versus Ha: p1  p2  0 using


.01 and the following data:

m
200 number of successes
30 n
600 number of successes
180

(Similar data is given in “Impact of Deals and Deal Retraction on Brand Switching,” J. Marketing, 1980: 62–70.)