Question

if the area to the left of a z - score is less than 0.5, what must be true?
choose the correct answer below.
a. the z - score must be positive.
b. the z - score must be equal to zero.
c. the z - score must be equal to one.
d. the z - score must be negative.

Explanation:

The standard normal distribution is symmetric about z = 0. The area to the left of z = 0 is 0.5. If the area to the left of a z - score is less than 0.5, it means the z - score is to the left of 0 on the standard normal distribution curve, so it must be negative.

Answer:

D. The z - score must be negative.