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11-04-2024
Mathematics

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Scores at a local high school on the American College Testing (ACT) college entrance exam follow a normal distribution with a mean of 18 and a standard deviation of 8. A guidance counselor takes a random sample of 20 students and calculates the mean score, x⎯⎯.
Calculate the mean and standard deviation of the sampling distribution of x⎯⎯.

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