One sample has a mean of M = 4 and a second sample has a mean of M = 8. The two samples are combined into a single set of scores.
What is the mean for the combined set if both of the original samples have n = 7 scores?
What is the mean for the combined set if the first sample has n = 3 and the second sample has n = 7?
What is the mean for the combined set if the first sample has n = 7 and the second sample has n = 3?
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