For a study conducted by the research department of a pharmaceutical company, 245 randomly selected individuals were ask

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For A Study Conducted By The Research Department Of A Pharmaceutical Company 245 Randomly Selected Individuals Were Ask 1 (47.27 KiB) Viewed 56 times

For a study conducted by the research department of a pharmaceutical company, 245 randomly selected individuals were asked to report the amount of money they spend annually on prescription allergy relief medication. The sample mean was found to be $17.70 with a standard deviation of $4.90. A random sample of 240 individuals was selected independently of the first sample. These individuals reported their annual spending on non-prescription allergy relief medication. The mean of the second sample was found to be $18.30 with a standard deviation of $3.70. As the sample sizes were quite large, it was assumed that the respective population standard deviations of the spending for prescription and non-prescription allergy relief medication could be estimated as the respective sample standard deviation values given above. Construct a 90% confidence interval for the difference uz uy between the mean spending on prescription allergy relief medication (11) and the mean spending on non-prescription allergy relief medication (12). Then find the lower limit and upper limit of the 90% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.) Lower limit: 0 Upper limit: 0 х 5 ?