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1] A researcher is comparing 4 groups to test if they have the same means. There are 72 data values altogether.

1] A researcher is comparing 4 groups to test if they have the same means. There are 72 data values altogether. The degrees of freedom for the Between(dfB) and the degrees of freedom for the With-in (dfW) are?
2] If there are 3 means to be compared, then how many possible different comparisons are there altogether?

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