An advertising agency wants to analyze the impact of a new advertisement about HDTVs (high definition televisions).

Question:

An advertising agency wants to analyze the impact of a new advertisement about HDTVs (high definition televisions). The agency selects a random sample of potential consumers of the televisions, and asks them to rate their readiness to buy an HDTV before and after seeing the ad. The ratings are on a scale of 1 to 4, where 1 corresponds to unwilling to buy, and 4 corresponds to ready to buy. Is there evidence, at the 5% significance level, that consumers' willingness to buy would be higher after seeing the ad? Do this question with the Excel template, and compare your answer to the results you get when you do it by hand.