Shoppers were asked where they do their regular grocery shopping. The table below shows the responses of the sampled shoppers. We are interested in determining if the proportions of females in the two categories are different from each other. (30 points)

	Grocery Chain	Discount Store
Male	230	80
Female	80	50

a) State the null and alternative hypotheses to be tested.

b) Copy the table below to answer box and complete the contingency table of the expected frequencies.

	Grocery Chain	Discount Store
Male
Female

C)Compute the test statistic (chi-square) and round to the second decimal place. The null hypothesis is to be tested at 95% confidence. Determine the critical value for this test. What do you conclude?