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5. The following vocabulary score means were calculated for four different groups of children. Calculate the overall mean across all four groups. Group A Group

5. The following vocabulary score means were calculated for four different groups of children. Calculate the overall mean across all four groups.

Group A Group B Group C Group D

Mean = 24 Mean = 16 Mean = 30 Mean = 17

N = 10 N = 8 N = 14 N = 9

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