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A town has 500 real estate agents The mean value

A town has 500 real estate agents. The mean value of the properties sold in a year by these agents is $800,000, and the standard deviation is $300,000. A random sample of 100 agents is selected, and the value of the properties they sold in a year is recorded.

a. What is the standard error of the sample mean?

b. What is the probability that the sample mean exceeds $825,000?

c. What is the probability that the sample mean exceeds $780,000?

d. What is the probability that the sample mean is between $790,000 and $820,000?

a. What is the standard error of the sample mean?

b. What is the probability that the sample mean exceeds $825,000?

c. What is the probability that the sample mean exceeds $780,000?

d. What is the probability that the sample mean is between $790,000 and $820,000?

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