ind a confidence interval 23

timer Asked: Jul 10th, 2015

Question description

Use the confidence level and sample data to find a confidence interval for estimating the population μ. Round your answer to the same number of decimal places as the sample mean. A group of 64 randomly selected students have a mean score of 38.6 with a standard deviation of 4.9 on a placement test. What is the 90% confidence interval for the mean score, μ, of all students taking the test?    

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