Answer Happy

The marketing manager for a software company is trying to decide whether to market her company's newest product by mail, on television, or through the Internet. She selects 20 communities in which to test-market the product, advertising through one of the three media in each community. The following table shows the amount of sales, in hundreds of dollars, for each community: Mail 6 8 10 2695 4 TV 9 12 8 (c) Find the critical value of F. 14 4 7 Sales are normally distributed and the standard deviations are equal for all three methods of advertising. You are to test the hypothesis that the means are the same for all three treatments using the ANOVA method. (a) State the null and the alternative hypotheses for the test. (b) Find the degrees of freedoms for the F-distribution. (d) Find the value of the test statistic F. Internet 16 11 10 8 9 14 12 (e) Find the p-value and make your decision.