The manager of a chain of three discount drug stores wishes to investigate the level of discount coupon redemption at its stores. All three stores have the same sales volume. Therefore, the manager will randomly sample 200 customers at each store with regard to coupon usage. The survey results are given in Table. Test the hypothesis that redemption level and location are independent with α = .01. Use the MINITAB output in Figure.
Answer to relevant QuestionsConsider the sample of 65 customer satisfaction ratings given in Table 12.11. Carry out a chi-square goodness-of-fit test of normality for the population of all customer satisfaction ratings. Recall that we previously ...The purchase frequencies for six different brands of a digital camera are observed at a discount store over one month: a. Carry out a test of homogeneity for these data with α = .025. b. Interpret the result of your test. The MINITAB output of a simple linear regression analysis of the data set for this case (see Table 13.3 is given in Figure 13.11. Recall that a labeled MINITAB regression output is on page 482. The following partial MINITAB regression output for the natural gas consumption data relates to predicting the city’s natural gas consumption (in MMcf) in a week that has an average hourly temperature of 40° F. a. Report ...Total variation = 1,025,339.6667; SSE = .746.7624; b1 = 10.1463.
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