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Answer and how to solve please 12. A population has a u = 30 and o = 12. A random sample of n =36 is

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Answer and how to solve please

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12. A population has a u = 30 and o = 12. A random sample of n =36 is selected. Calculate the standard error of the mean. 13. A population has a u = 55 and o = 18. A random sample of n = 81 is selected. Calculate the standard error the mean

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