For a population with a standard deviation of 6 what is the

For a population with a standard deviation of = 6, what is the z-score corresponding to a score that is 12 points above the mean?

a.

z = 1

b.

z = 2

c.

z = 6

d.

z = 12

Solution

Note that

z = (x - u) / sigma

As x - u = 12

an sigma = 6, then

z = 12 / 6 = 2 [ANSWER, OPTION B]