Question 1052544
Mean Square Total is an estimate of total variance against the grand mean (mean of all samples): (SS_total)/N-1 (note: _total indicates subscript)
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Mean Square Between groups compare the means of groups to the grand mean: (SS_between)/K-1 If the means across groups are close together this number will be small
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Mean Square Within groups calculate the variance within each individual group: (SS_within)/N-K
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Mean Square Between and Mean Square Within are used to calculate the F-ratio: F-ratio = MS_between/MS_within