53% of adult shoppers prefer to pay cash for purchases, 30% use checks, 16% use credit cards, and 1% have no preference. The owner of a large store randomly selected 800 shoppers and asked their payment preferences.
The results were that 400 paid cash, 210 paid by check, 170 paid with a credit card, and 20 had no preference.At a=0.01, test the claim thatthe owner's customers have the same preferences asthose surveyed.