Free dessert: In an attempt to increase business on Monday nights, a restaurant offers a free dessert with every dinner order. Before the offer, the mean number of dinner customers on Monday was 150. Following are the numbers of diners on a random sample of 12 days while the offer was in effect. Can you conclude that the mean number of dinners decreased while the free dessert offer was in effect? Use the a 0.05 level of significance and the P-value method with the TI-84 Plus calculator. 175 138 160 121 181 108 111 120 143 189 161 122 (a) Following is a boxplot for these data. Is it reasonable to assume that the conditions for performing a hypothesis test are satisfied? Explain. (b) State the appropriate null and alternate hypotheses. (c) Compute the P-value. (d) Determine whether to reject H Use the a-0.05 level of significance. (e) State a conclusion. Following is a boxplot for these data. Is it reasonable to assume that the conditions for performing a hypothesis test are satisfied? Explain. 120 160 100 140 200 220 180 240 The boxplot shows that there (Choose one Y outliers. hoose one) The boxplot shows that there evidence of strong skewness. Choose pr We assume that the population is approximately normal. It Choose ono reasonable to assume that the conditions are satisfied. Part 2 of 5

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