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The speeds of vehicles traveling on a highway are normally distributed with an unkown population mean and standard deviation. a random sample of 11 vehicles is taken and results in a sample mean of 65 miles per hour and sample standard deviation of 9 miles per hour. determine and interpret the 90% confidence interval for the mean speeds of vehicles traveling on the highway.
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The speeds of vehicles traveling on a highway are normally distributed with an unkown population mea...
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