Suppose a normal distribution has a mean of 12 and a standard deviation of 4.A value of 18 is how many standard deviations away from the mean?A. −2B. −1.5C. 1.5D. 2

Hello!

The mean is 12

The data has a standard deviation of 4

Look and see how far away 18 is from 12 using 4

12 + 4 = 16

16 is one deviation

16 + 4 = 20

20 is two deviation

18 is right in the middle

The answer is C. 1.5 deviations

Hope this helps!