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Problem 2 The average zinc concentration in a sample of measurements taken in 36 different locations in a river is found to be 3.0 grams

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Problem 2 The average zinc concentration in a sample of measurements taken in 36 different locations in a river is found to be 3.0 grams per millimeter. Find the 95% confidence interval for the mean of zinc concentration in the fiver. The population standard deviation, o, is known to be 0.6 gram per millimeter

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