1. Laundry detergents, part 2. One member of the consumer group in Exercise 15 is concerned that the experiment will take too long and makes some suggestions to shorten it. Comment briefly on each idea.
a) Cut the runs to 8 by testing only the new detergent. Compare the results to results on the standard detergent published by the manufacturer.
b) Cut the runs to 8 by testing only in hot water.
c) Keep the number of runs at 16, but save time by running all the standard detergent runs first to avoid swapping detergents back and forth.
2. Swimsuits. A swimsuit manufacturer wants to test the speed of its newly designed $550 suit. They design an experiment by having 6 randomly selected Olympic swim- mers swim as fast as they can with their old swimsuit first and then swim the same event again with the new, expensive swim suit. They'll use the difference in times as the response variable. Criticize the experiment and point out some of the problems with generalizing the results.