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The population has a mean of 20 and a standard deviation of 9. The sample size of your sampling distribution is N=18. What is the

The population has a mean of 20 and a standard deviation of 9. The sample size of your sampling distribution is N=18. What is the variance of the sampling distribution of the mean?

A. 2.5

B. 3.5

C. 4.5

D. 10.5

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