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A population of n?20 scores has a mean of? 15. one score in the population is changed from x? 8 to x? 28. what is the value for the new population mean?

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  1. 15 July, 22:03
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    20 has been added to the total of scores, so the new mean for the 20 scores will be 20/20 = 1 higher than it was.

    The new population mean is 15+1 = 16.
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