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You repeatedly draw samples of n = 100 from a population with a mean of 75...

You repeatedly draw samples of n = 100 from a population with a mean of 75 and a standard deviation of 4.5. What is the z-score for a sample mean of 64.7?

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Answer #1

Solution:

Given that,

= / n = 4.5 / 100 = 0.45

z-score = ( - ) /

= (64.7 - 75) / 0.45

= - 22.89

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