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Question 4 Assuming the population has an approximate normal distribution, if a sample size n = 18 has a sample mean c = 45 with

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Question 4 Assuming the population has an approximate normal distribution, if a sample size n = 18 has a sample mean c = 45 with a sample standard deviation s = 9, find the margin of error at a 80% confidence level. Round the answer to two decimal places

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