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A researcher is interested in whether there is a significant difference between the mean age of marriage across three racial groups in the General Social

A researcher is interested in whether there is a significant difference between the mean age of marriage across three racial groups in the General Social Survey. Using the data below, calculate the degrees of freedom for the between-group sum of squaresanduse this quantity to calculate the mean square between.

Race

N

Mean

Black

113

25.39

White

904

22.99

Other

144

23.87

All Groups

1,161

23.33

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