Assume the distribution is normal. Use the area of the normal curve to answer the question. Round to the nearest whole percent.
-The mean monthly income of trainees at a local mill is $\$ 1100$ with a standard deviation of $\$ 150$. Find the probability that a trainee earns less than $\$ 900$ a month.
A) $8 \%$
B) $90 \%$
C) $19 \%$
D) $9 \%$

Question

Quizplus · Accepted Answer

The z-score for a monthly income of $900 is (900 - 1100) / 150 = -1.33. The area to the left of this z-score is 0.0918, or 9%.

Assume the Distribution Is Normal $1100\$ 1100$1100 With a Standard Deviation Of

Assume the Distribution Is Normal $\$ 1100$ With a Standard Deviation Of