Thunderstorm speeds: A meterorologist who sampled 13 thunderstorms found that th

Question

Thunderstorm speeds:     A meterorologist who sampled 13 thunderstorms found that the average speed at which they traveled across a certain state was 15 miles per hour. The standard deviation of the sample was 1.7 miles per hour. Find the 99% confidence interval of the mean. If a meterologist wanted to use the highest speed to predict the times it would take storms to travel across the state in order to issue warnings, what figure would she likely use? Thunderstorm speeds:     A meterorologist who sampled 13 thunderstorms found that the average speed at which they traveled across a certain state was 15 miles per hour. The standard deviation of the sample was 1.7 miles per hour. Find the 99% confidence interval of the mean. If a meterologist wanted to use the highest speed to predict the times it would take storms to travel across the state in order to issue warnings, what figure would she likely use?

Explanation / Answer

Formula is xbar +-t* s/n^0.5 so we have 15+-2.179 *1.7/13^0.5. Confidence interval is 15+-1.03= (13.97, 16.03). Highest estimate would be 16 (rounded).

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