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a statistician want to estimate the mean age off all college students. a random sample of 25 students indicates that the mean age is 24. past studies...

a statistician want to estimate the mean age off all college students. a random sample of 25 students indicates that the mean age is 24.6. past studies showed that the standard deviation is 1.3 years and the population is normally distributed. Find an 80% confidence interval for the mean age

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