Question

A marketing manager would like to test the claim that the percent increase of company sales after an advertising campaign is different than 17 percent. if the z− test statistic was calculated as z=2.43, does the marketing manager have enough evidence to reject the null hypothesis? assume α=0.01.

Answer 1

The marketing manager has enough evidence to reject the null hypothesis and conclude that the percent increase in company sales is different than 17 percent.

Step-by-step explanation:

To test the claim that the percent increase of company sales after an advertising campaign is different than 17 percent, the marketing manager calculated the z-test statistic to be 2.43. Given a significance level of 0.01, the marketing manager needs to determine if there is enough evidence to reject the null hypothesis. To make this decision, the marketing manager compares the z-test statistic to the critical value at the 0.01 significance level. If the z-test statistic is greater than the critical value, then there is enough evidence to reject the null hypothesis. In this case, since 2.43 is greater than the critical value, the marketing manager has enough evidence to reject the null hypothesis and conclude that the percent increase in company sales is different than 17 percent.