a random sample of 68 cows on a farm,the average weight is 172.2 lb. with a standard deviation 4.2 lb.Obtain an 81% confidence interval for the mean height of all the cows on the
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In a random sample of 68 cows on a farm,the average weight is 172.2 lb. with a standard deviation 4.2 lb.Obtain an 81% confidence interval for the mean height of all the cows on the farm.
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