A college admissions director wishes to estimate the mean age of all students currently enrolled. In a
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A college admissions director wishes to estimate the mean age of all students currently enrolled. In a random sample of 20 students, the mean age is found to be 22.9 years. From past studies, the standard deviation is known to be 1.5 years, and the population is normally distributed. Construct a 90% confidence interval for the population mean age.
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Anurag Agrawal
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Related Book For 
Elementary Statistics Picturing The World
ISBN: 9781292260464
7th Global Edition
Authors: Betsy Farber, Ron Larson
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