MBA413, week 11, 1 Exercise 5: Hypothesis Test about 1 2 : Matched Samples A survey was recently conducted to determine if consumers spend more on computer-related purchases via the Internet or store visits. Assume a sample of 8 respondents provided the following data on their computer-related purchases during a 30-day period. Using a 0.05 level of significance , can we conclude that consumers spend more on computer-related purchases by way of the Internet than by visiting stores? Expenditures (dollars) Respondent 1 2 3 4 5 6 7 8 Exercise 6: In-Store 132 90 119 16 85 248 64 49 Internet 225 24 95 55 13 105 57 0 Test for the Equality of k Population Means Regional Manager Sue Collins would like to know if the mean number of telephone calls made per 8-hour shift is the same for the telemarketers at her three call centers (Austin, La Vegas, and Albuquerque). A simple random sample of 6 telemarketers from each of the three call centers was taken and the number of telephone calls made in eight hours by each observed employee is shown below. Observation 1 2 3 4 5 6 Sample Mean Sample Variance Center 1 Center 2 Center 3 Austin 82 66 77 80 69 78 75.33 40.67 Las Vegas 72 63 76 60 74 70 69.17 40.17 Albuquerque 71 83 73 68 79 80 75.67 34.27 Using = 0.02, test for any significant difference in number of telephone calls made at the three call centers