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Suppose you know the population is normally distributed and that the population standard deviation is 0.75. a. Calculate the margin of error for a confidence

Suppose you know the population is normally distributed and that the population standard deviation is 0.75.

a.Calculate the margin of error for a confidence interval of 90% for a sample size of 3.

b.Calculate the margin of error for a confidence interval of 90% if you increased the sample size to 12.(Round your answer to three decimal places.)

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