How many numbers in the data set are within 1 standard deviation of the mean? a.13 b.14 c.15 d.16

The answer to this question would be: A.13

In this question, the mean is 20.2 and the standard deviation is 2.4. That means the range for of 1 standard deviation would be 20.2 +- 2.4= 17.8- 22.6
The number that included in that range would be 18-22. Then you just need to add them all

18  =2
19  =3
20 =4
21  =3
22 =1
The answer would be: 2+3+4+3+1 = 13

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for