If mean educational attainment (years of schooling) in the population is 13, with a standard deviati


Question: If mean educational attainment (years of schooling) in the population is 13, with a standard deviation of 3 years.

(a) What is the probability that I could obtain a sample of 100 people in which the mean years of schooling was less than 12?

(b) What is the 95% confidence interval for the sample mean?

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