Imagine you are interested in whether there is a significant difference between the mean age of marriage across educational groups. If the F statistic is 6.10, use the data below to determine the value of the mean square within. Round to 2 decimal places.

Highest Degree________________ N______________ Mean

Less than high school...............195......................22.47

High school...........................590.....................22.87

Junior college...........................86.....................23.71

Bachelor's degree....................185.....................24.58

Graduate degree.....................104.....................25.10

All Groups...........................1,161.....................23.33