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I am not understanding why this question is saying the sample mean is 42.7. My data numbers are 21, 37, 36, 34, 46, 42, 38,

I am not understanding why this question is saying the sample mean is 42.7. My data numbers are 21, 37, 36, 34, 46, 42, 38, 30, and 55. With Excel and my calculator it says the mean is 37.66.

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