Mason is the head of an automobile firm. The firm has two manufacturing units, one located in a city and the other located in a town. The manufacturing unit located in the town requires maintenance, repair, and operations (MRO) supplies to enable a smooth running of the manufacturing process. Mason delegates this task to an external consultant who buys necessary goods and services on behalf of the firm. In this case, the external consultant acts as a

Which is cheaper: eating out or dining in? the mean cost of a flank steak, broccoli, and rice bought at the grocery store is $13.04 (money. msn website, november 7, 2012). a sample of 100 neighborhood restaurants showed a mean price of $12.75 and a standard deviation of $2 for a comparable restaurant meal. a. develop appropriate hypotheses for a test to determine whether the sample data support the conclusion that the mean cost of a restaurant meal is less than fixing a comparable meal at home. b. using the sample from the 100 restaurants, what is the p-value? c. at a = .05, what is your conclusion? d. repeat the preceding hypothesis test using the critical value approach