Lab #3 – Normal Distribution & Confidence Intervals
Find a 95% confidence interval for the mean time spent on housework per week by all married women. A fleet of 100 airplanes has an air time (time spent flying) standard deviation of 14,9 hours. A sample of 32 of these planes gave a mean air time of 49 hours. Construct a 90% confidence interval on the mean air time for this fleet. ................
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