Ralf and his brother had a business in a Midwest college town taking SUVs and modifying them into tailgating machines. These "awesome party wagons" were equipped with the owner's desired team logo on the front, side, and back; gas grills; and large beverage coolers. Their business boomed, especially when the university had a winning season. Ralf and his brother were creating and selling what could be best described as .

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