Premium Product Promotions, a market research firm

Premium Product Promotions, a market research firm, is trying to determine if there are differences in the brand of beer preferred by various customer groups. Formulate and test a hypothesis for them using a = 0.05 if the following data are the preferences of a sample of 800.

CUSTOMER GROUP BRAND OF BEER

                                                             Pale                      Golden                            Heavy

Housewives 75 20 5

Businessmen 50 130 20

Factory Workers 5 25 170

College Students 100 100 100