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Suppose that you sample 64 high school baseball pitchers in one county and find that they have a mean fastball pitching speed of 85.00 miles per hour (mph) with a standard deviation of 5.98 mph. Find a 99% confidence interval for the mean fastball pitching speed of all high school baseball pitchers in the county. Interpret the interval. Assume that the fastball ball pitching speeds are normally distributed.
Sagot :
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