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A normally distributed population has a mean of 40 and a standard deviation of 10 For this population, what proportion of the scores are between

A normally distributed population has a mean of 40 and a standard deviation of 10

For this population, what proportion of the scores are between 38 and 42?

If random samples of size n = 25 are selected from this population, what proportion of sample means will have values between 38 and 42?

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