Question

A major home improvement store conducted its biggest brand recognition campaign in the company's history. A series ofnew television advertisements featuring well-known entertainers and sports figures was launched. A key metric for thesuccess of television advertisements is the proportion of viewers who "like the ads a lot." A study of 1,189 adults who viewedthe ads reported that 230 indicated that they "like the ads a lot." The percentage of a typical television advertisementreceiving the "like the ads a lot" score is believed to be 22%. Company officials wanted to know if there is evidence that theseries of television advertisements are less successful than the typical ad (i.e. if there is evidence that the populationproportion of "like the ads a lot" for the company's ads is less than 0.22) at a 0.01 level of significance.20)Referring to Scenario 9-7, state the null hypothesis for this study.

Please explain why.

Answer 1