Posted by
**Rhea** on
.

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?