SOLUTION: Suppose that the average annual income of a defense attorney is $150,000 with a standard deviation of $40,000. Assume that the income distribution is normal. a) What is the prob

Question 61686: Suppose that the average annual income of a defense attorney is $150,000 with a standard deviation of $40,000. Assume that the income distribution is normal.
a) What is the probability that the average annual income of a sample of 5 defense attorneys is more than $120,000?
b) What is the probability that the average annual income of a sample of 5 defense attorneys is less than $120,000?
c) What is the probability that the average annual income of a sample of 10 defense attorneys is between $125,000 and $160,000?
d) What is the probability that the average annual income of a sample of 15 defense attorneys is more than $120,000?
e) What is the probability that the average annual income of a sample of 50 defense attorneys is more than $150,000?

Answer by stanbon(48568) (Show Source):
You can put this solution on YOUR website!
These are all normal distribution problems.
They involve converting your raw scores to z-scores
and using a calculator or table to read the proper
probability.
Are you having trouble with one or more of these
steps?
Cheers,
Stan H.