The mean of 2, 3, and 4 is 3.0. The mean of 5, 6, 7, 8, and 9 is 7.0. The weighted mean is
A) 5.0
B) 4.5
C) 5.5

Question

Quizplus · Accepted Answer

The weighted mean takes into account the number of values in each group. For the first group (2, 3, 4), the mean is 3.0, and there are 3 values. For the second group (5, 6, 7, 8, 9), the mean is 7.0, and there are 5 values. The weighted mean is calculated as: [(3*3) + (7*5)] / (3+5) = (9 + 35) / 8 = 44 / 8 = 5.5.

The Mean of 2, 3, and 4 Is 3