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Wii PlayStation Xbox
37 26 31
31 21 20
47 24 38
29 24 31
36 25 30

Nintendo Sony would like to test the hypothesis that a difference exists in the average age of users of Wii, a PlayStation, or an Xbox console game. The following data ile represents the age of a random sample of Wii, PlayStation, and Xbox users: What is the GRAND MEAN for these observations? grand mean.xlsx 31.3 30.0 O 31.8 30.9

math   Statistics-And-Probability   
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Answer #1

37 31 47 29 36 26 21 24 24 25 31 20 38 31 30 4 30 36 24 8 Mean 30 10 Grand mean

Therefore, Grand Mean = 30.

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