# Question

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?

## Answer to relevant Questions

An English literature course was taken by 250 students. Each member of a random sample of 50 of these students was asked to estimate the amount of time he or she spent on the previous week's assignment. Suppose that the ...Suppose that we have a population with proportion P = 0.50 and a random sample of size n = 900 drawn from the population. a. What is the probability that the sample proportion is more than 0.52? b. What is the probability ...A charity has found that 42% of all donors from last year will donate again this year. A random sample of 300 donors from last year was taken. a. What is the standard error of the sample proportion who will donate again this ...Suppose that 50% of all adult Americans believe that federal budget deficits at recent levels cause long-term harm to the nation's economy. What is the probability that more than 58% of a random sample of 250 adult Americans ...A process produces batches of a chemical whose impurity concentrations follow a normal distribution with a variance of 1.75. A random sample of 20 of these batches is chosen. Find the probability that the sample variance ...Post your question

0