Question

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

Answer 1

The correct answer is C. 1.5

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