Q18

u.instructure.com To Canvas Gmail ) Youtube & Maps ISOM 112 Final Fla.. L Margin of Error Ca. Easy Confidence l. Greystone Department Stores, Inc., operates two stores in Buffalo, New York: one is in the inner city and the others is in suburban shopping center. The regional manager noticed that products that sell well in one store do not always sell well in the other. The manager believes this situation may be attributable to difference between the mean ages of the customers who shop at the two stores. The data collected from two independent simple random samples of Greystone customers provided the following sample average ages (years). Population Samples n Sample Mean Standard Deviation Inner-city Store 36 40 9 Suburban Store 49 35 10 Which of the following on the construction of a 95% confidence interval for the difference between two population means is correct? The interval is (40 - 35) + 1.645x 367 49 . Or (1.58, 8.42). The interval is (40 - 35) + 1.96 x 9 + 10 Or (3.68, 6.32). The interval is (36 - 49) + 1.96 x + .Or (-14.4, -11.6). The interval is (36 - 49) + 1.96x 40 35 92 + 105 Or (-17.33, -8.67). The interval is (40 - 35) + 1.96x 92 36 49 . Or (0.92,9.08)