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The scores in the Stanford IQ test are known to be normally distributed with population mean 100 and population standard deviation 16. Suppose a random

The scores in the Stanford IQ test are known to be normally distributed with population mean 100 and population standard deviation 16. Suppose a random sample of size 9 will be selected.

What is the probability of selecting a sample whose mean is between 96 and 112?

Suppose the population standard deviation is unknown. What is the probability of selecting a sample whose mean is greater than 111.16 if the standard deviation of the sample is 18?

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Fundamental Statistics for the Behavioral Sciences

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