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 - 2

B - 1.5

C 1.5

D 2

The correct answer is C. 1.5

Step-by-step explanation:

To find this, first find the difference from the value to the mean.

18 - 12 = 6

Now that we have this, divide it by the size of a standard deviation to find how many it is away.

6/4 = 1.5