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Conduct a two-tailed t test at the .01 level of significance

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Reference no: EM131429825

In the population, it is hypothesized that flags have a mean usable life of 100 days. Twenty-five flags are flown in the city of Tuscaloosa and are found to have a sample mean usable life of 200 days with a standard deviation of 216 days. Does the sample mean in Tuscaloosa differ from that of the population mean?

a. Conduct a two-tailed t test at the .01 level of significance.

b. Construct a 99% CI.

Reference no: EM131429825

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