9.38 Taste Testing In a head-to-head taste test of store-brand foods versus national brands, Consumer Reports found that it was hard to find a taste difference in the two.12 If the national brand is indeed better tast- ing than the store brand, it should be judged as better more than 50% of the time.

a. State the null and alternative hypothesis to be tested. Is this a one- or a two-tailed test?

b. Suppose that, of the 35 food categories used for the taste test, the national brand was found to be better than the store brand in 8 of the taste comparisons. Use this information to test the hypothesis in part

a. Use a = 0.01. What practical conclusions can you draw from the results?