NSS (13) Spanish 3 X Mail - John W. Hall X Surah Al-A'raf - 1-2 X I JSTOR: Search Res X Head to Head: The ourses/7311 Page > of 2 1. 2. At a restaurant, a lemon odor was spread through the restaurant on one Saturday evening and no odor on another Saturday evening. The number of minutes customers spent in the restaurant on both nights were recorded. Since the Saturday evenings were comparable many ways, we will take our data as being from two independent simple random samples. Here are the data: Sample Mean Sample Std. Dev. Sample Size 1 - No odor 91.3 14.9 2 Lemon odor 89.8 15.4 28 (a) (2 pts) To do a 95% confidence interval for the difference in population mean time spent in the restaurant with the different odors, what value of t* would you use? (b) (3 pts) Find the 95% confidence interval for the difference in population mean time spent in the restaurant with the different odors. 741 APR 236 étv 4. MacBook Air 000 DD F4 F5 F6 %24

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