a study showed that 64% of supermarket shoppers believe supermarket brands to be as good as national name brands. to investigate whether this result applies to its own product, the manufacturer of a national name-brand ketchup asked a sample of shoppers whether they believed that supermarket ketchup was as good as the national brand ketchup. (a) formulate the hypotheses that could be used to determine whether the percentage of supermarket shoppers who believe that the superma
