Considering the box-plots, the means for the data-sets are given as follows:
What does a box-plot shows?
Each shows the number of times each measure appears.
Hence, the mean of data-set A is given as follows:
mA = (3 + 4 x 3 + 5 x 2 + 6 x 2 + 7 x 3 + 8)/(1 + 3 + 2 + 2 + 3 + 1) = 5.5.
For data-set B, the mean is:
mB = (2 x 4 + 2 x 5 + 2 x 6)/(2 + 2 + 2) = 5.
More can be learned about box-plots at https://brainly.com/question/27388675
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