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14. IQ scores form a normal distribution with a mean of m = 100 and a standard deviation of o = 15. What is the

14. IQ scores form a normal distribution with a mean of m = 100 and a standard deviation of o = 15. What is the probability of obtaining a sample mean greater than M = 103. show all work.

a. for a random sample of n = 9 people?

b. for a random sample of n = 25 people?

c. for a random sample of n = 100 people?

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