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Mathematics, 25.02.2020 23:54 ajayrose
A study by Consumer Reports 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 random sample of 350 shoppers showed that 217 thought the supermarket brand was as good as the national brand. Should we conduct a one or two tail test in this situation?
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