Question: The EPA wants to test a randomly selected sample ofn water specimens and estimate the mean daily rate of pollution produced by a mining operation.

The EPA wants to test a randomly selected sample ofn water specimens and estimate the mean daily rate of pollution produced by a mining operation. If the EPA wants a98% confidence interval with a bound of error of1.5 milligram per liter (mg/L), how many water specimens are required in the sample? Assume prior knowledge indicates that pollution readings in water samples taken during a day have been approximately normally distributed with a standard deviation of3.2 (mg/L).

N=?

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