Statistics Dictionary

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Marginal Mean

In analysis of variance, a marginal mean is the mean of one factor at one level across all levels of other factors.

Below, a two-way table shows test scores for men and women from different regions of the country. The mean scores displayed along the outside edges are marginal means.

East Central West Mean
Men 2 10 8 6.67
Women 16 6 8 10
Mean 9 8 8 . . .

See also:   ANOVA With Full Factorial Experiments