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What are the mean and standard deviation

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1. A population has a mean of 50 and a standard deviation of 6. (a) What are the mean and standard deviation of the sampling distribution of the mean for N = 16? (b) What are the mean and standard deviation of the sampling distribution of the mean for N = 20?
2. Given a test that is normally distributed with a mean of 100 and a standard deviation of 12, find:
a. the probability that a single score drawn at random will be greater than 110
b. the probability that a sample of 25 scores will have a mean greater than 105
c. the probability that a sample of 64 scores will have a mean greater than 105
d. the probability that the mean of a sample of 16 scores will be either less than 95 or greater than 10

Reference no: EM13532187

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