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Answer to Question #37678 in Statistics and Probability for Joanna
Question #37678
Use the confidence level and sample data to find a confidence interval for estimating the population mean.
A group of 56 randomly selected students have a mean score of 30.8 with a standard deviation of 4.5 on a placement test. What is the 90% confidence interval for the mean score, of all students taking the test?
A group of 56 randomly selected students have a mean score of 30.8 with a standard deviation of 4.5 on a placement test. What is the 90% confidence interval for the mean score, of all students taking the test?
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