The owner of Big Fish supermarket was reviewing some data from a research report on the type of advertisements in the local paper that are most effective. Three types of ads (big headline, straight forward and bold print) were randomly alternated over a period of weeks and the number of shoppers that reported that they read the ad was tallied. Do the data below support the hypothesis that there is no difference in the effectiveness of the ads, as measured by the mean number of shoppers who reported reading the ad? Use an alpha of .05.
Type of Advertisement
Big Headline Straight Forward Bold Print
23 19 28
42 31 33
36 18 46
48 24 29
33 26 34
26 25 34
Conduct all steps of the hypothesis test. Remember to include hypotheses, test statistic, decision, and conclusion.