(Answered) Civil engineers collected data from one area of wisconsin

Management Studies

Civil engineers collected data from one area of Wisconsin on the amount of salt (in tons) used to keep highways drivable during a snowstorm. The amount of salt for n = 20 storms are given: 1111 2115 1573 2813 2815 2126 854 3965 1819 776 1484 2056 784 779 1373 1237 1701 1957 246 1730

[a.] Does it appear that the conditions for a confidence interval on the population mean are satisfied? Justify why or why not (Hint: A Normal QQ plot would be useful here). We're going to make one anyway, but we should know whether it is appropriate to do so.

[b.] Report the summary statistics for a confidence interval on the population mean (though I am not interested in the calculations here).

[c.] Construct a 95% confidence interval for the population mean salt used per storm.

[d.] In 1-2 sentences, interpret the confidence interval in the context of the problem.

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