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IQ scores form a normal distribution with a mean of = 100 and a standard deviation of = 15. What is the probability of obtaining
IQ scores form a normal distribution with a mean of = 100 and a standard deviation of = 15. What is the probability of obtaining a sample mean greater than M = 103. |
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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