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Unformatted text preview: year. What assumptions are necessary to do this problem? 4. A clinic offers a weight reduction program. A review of its records found the following weight losses, in pounds, for a random sample of ten of its patients the conclusion of the program 18.2 25.9 6.3 11.8 15.4 20.3 16.8 19.5 12.3 17.2 Assuming the population distribution is normal, find a 99% confidence interval estimate for the population mean. 5. The manager of the Inlet Square Mall wants to estimate the mean amount spent per shopping visit by customers. A sample of 60 customers reveals a sample mean of $49.35. a. Determine a 95% confidence interval and interpret the result. b. Suppose the sample was of 60 customers, and yielded the same mean and standard deviation. Determine the 95% CI and compare to part a....
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 Spring '08
 Martin

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