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A meteorologist who sampled 7 thunderstorms found that the average speed at which they traveled across...

A meteorologist who sampled 7 thunderstorms found that the average speed at which they traveled across a certain state was 14 miles per hour. The standard deviation of the sample was 4.1 miles per hour round the final answers to two decimal places

find the 80% confidence interval of the mean assume the variable is normally distributed

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