data set b\nfind the mean of each data set.

Explanation:

Step1: Count data - points

There are 3 + 2+3 + 2+3 = 13 data - points.

Step2: Calculate sum of data - values

Sum = 4×3 + 5×2+6×3 + 7×2+8×3 = 12 + 10+18 + 14+24 = 78.

Step3: Calculate the mean

Mean = $\frac{78}{13}$ = 6.

Answer:

6