# Sampling Distribution Complete solutions and illus

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Sampling Distribution
Complete solutions and illustrations are required.
1.The average annual salary for all U.S. teachers is \$29,863. Assume that the distribution is normal and the standard deviation is \$5,200.
a.Find the probability that a randomly selected teacher earns at least \$35,000 a year.
b.What is the probability that the mean for a sample of 80 teachersâ€™ salaries is greater than \$30,000?

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