SOLUTION: The incomes of trainees at a local mill are normally distributed with a mean of $1,100 and a standard deviation $150. The percentage of trainees that earn less than $900 a month is
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Question 1033293: The incomes of trainees at a local mill are normally distributed with a mean of $1,100 and a standard deviation $150. The percentage of trainees that earn less than $900 a month is ___%. Round to the hundredth percent. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! The z value =(900-1100)/150
That is -200/150=-4/3.
The probability of z < -1.433 is 0.0912 or 9.12%.
