Version:0.9 StartHTML:0000000105 EndHTML:0000001750 StartFragment:0000000141 EndFragment:0000001710 Three different advertising displays were developed to market a product. To

determine whether the displays differ in effectiveness, the three displays are used for a month in each of

four different stores in random order. The number of units of the product sold in a month is recorded as

shown below. Do the data provide sufficient evidence to indicate that the mean number of units sold differ

for at least 2 of the 3 displays? If the null hypothesis is rejected, conduct further tests to determine which

displays differ. Use the .05 level of significance. Assume that the data meet the assumptions necessary to do an ANOVA test.

Question 5 (24 Points) Three different advertising displays were developed to market a product. To determine whether the displays differ in effectiveness, the three displays are used for a month in each of four different stores in random order. The number of units of the product sold in a month is recorded as shown below. Do the data provide sufcient evidence to indicate that the mean number of units sold differ for at least 2 of the 3 displays? If the null hypothesis is rejected, conduct further tests to determine which displays differ. Use the .05 level of significance. Assume that the data meet the assumptions necessary to do an ANOVA test. Product Sold (unit) Stores Displayl Display2 Display?) A 2 3 6 B 3 5 ? C 3 6 8 D 8 7 8