A study shows that 70% of consumers believe cheaper supermarket brands are just as good as national name brands. In response to these findings, a national brand asked a sample of shoppers whether they believe that supermarket ketchup was as good as the national brand ketchup.

Formulate the null and alternative hypotheses, in words, for a test to determine whether the proportion of shoppers who believe that supermarket brands are just as good as national brands differs from 70%.