SOLUTION: The incomes of trainees at a local mill are normally distributed with a mean of $1100 and a standard deviation of $150. What percentage of trainees earn less than $900 a month?

SOLUTION: The incomes of trainees at a local mill are normally distributed with a mean of $1100 and a standard deviation of $150. What percentage of trainees earn less than $900 a month?

Algebra.Com

Question 377858: The incomes of trainees at a local mill are normally distributed with a mean of $1100 and a standard deviation of $150. What percentage of trainees earn less than $900 a month?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
. Then P(X < 900) = P(Z < -1.33) . The percentage is equal to this probability times 100%. Just use a table of standard normal values to find the probability.
RELATED QUESTIONS
The incomes of trainees at a local mill are normally distributed with a mean of $1,100... (answered by Boreal)

The monthly incomes of trainees at a local mill are normally distributed with a mean of... (answered by stanbon)

The incomes of trainees at a local mill are normally distribution with a mean of $1,100... (answered by CubeyThePenguin)

1. suppose that the iq score of a large companys management trainees are normally... (answered by ewatrrr)

the distribution of annual incomes of a sample of college graduates is normally... (answered by Positive_EV)

At a local high school, GPA's are normally distributed with a mean of 2.9 and standard... (answered by ewatrrr)

the mean height of 15 to 18 year old males is normally distributed with a mean of 170cm... (answered by fsdf)

The scores on a test are normally distributed with the mean of 150 and a standard... (answered by ewatrrr)

The weekly output of a steel mill is normally distributed with the mean of 130 tons and... (answered by stanbon)