Question

In a study about children’s pocket money, two samples of schoolchildren were asked how much money they received each week. In one sample, of size 25, the mean is £6.00. In the other sample, of size 43, the mean is £9.21.
Calculate the mean based on the combined sample. Give your answer correct to two decimal places.
Ms. Sue
(25 * 6) + (43 * 9.21) = 150 + 396.03 = 546.03

546.03 / 68 = ?

8.03 (to 2 d.p) Thanks

Ms. Sue
You're welcome, Jay.

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