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A population has a mean mu90 and a standard deviation

A population has a mean mu=90 and a standard deviation sigma=20. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=254.

mean/x= ? (simplify)

sigma/x= ? ( type an integer or decimal rounded to three decimal places as needed)

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Business Economics: A population has a mean mu90 and a standard deviation

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