Question

a set of quiz scores is shown in the histogram below. the mean of the data set is 6.625 and the population standard deviation is 1.9 How many numbers in the data set are within 1 standard deviation of the mean? a)7 b)10 c)12 d)13

Answer 1

Given

Mean = 6.625

Standard Deviation = 1.9

Values within 1 standard deviation of mean, mean:

[tex]\begin{gathered} 6.625-1.9We look at the number of values at 5, 6, 7, and 8.

5 = 2 people

6 = 2 people

7 = 5 people

8 = 3 people

Total = 2 + 2 + 5 + 3 = 12 people

Answer

C