92 124 95 121 78 88 108 126 114 105 129 109 103 85 107 104 74 73 60 68 69 98 Lavender Odor 106 89 103 107 104 116 75 94 63 96 94 79 106 73 87 92 107 137 109 88 Lemon Odor 112 83 108 91 88 56 90 113 97 No Odor 72 121 92 84 72 92 109 115 91 84 76 96 93 118 87 101 75 86 93 94 109 88 105 76 98 108 105 102 108 97 101 106 97 101 83 89 106
Businesses know that customers often respond to background music. Do they also respond to odors? Nicolas Guéguen and his colleagues studied this question in a small pizza restaurant in France on Saturday evenings in May. On one evening, a relaxing lavender odor was spread through the restaurant; on another evening, a stimulating lemon odor; a third evening served as a control, with no odor. The three evenings were comparable in many ways (weather, customer count, and so on), so we are willing to regard the data as independent SRSs from spring Saturday evenings at this restaurant.
The given table contains data on how long (in minutes) customers stayed in the restaurant on each of the three evenings.
We want to be 95%
confident that we do not wrongly reject any of the three null hypotheses. Tukey pairwise comparisons can give conclusions that meet this condition. Use your preferred software to find the three Tukey confidence intervals.
First, find the 95%
Tukey confidence interval for the difference ?L−?Le.
Give your answers to five decimal places.
Give your answers to five decimal places.
Give your answers to five decimal places.
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