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9 June, 22:51

If three samples have means of 10, 20, and 15, respectively, what is their grand mean?

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Answers (2)
  1. 9 June, 23:34
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    I believe it would be 15. 10+20+15=45/3=15
  2. 10 June, 00:32
    0
    Their grand mean would be:

    10+20+15

    =45

    45:3

    =15
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