Question
Asked Nov 9, 2019
Find the indicated probability.
12) 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?
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Find the indicated probability. 12) 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?

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Step 1

12.

It is mentioned that the incomes of trainees at local mill are normally distributed with a mean of $1,100 and a standard deviation of $150.

That is, u1,100,0 150
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That is, u1,100,0 150

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Step 2

The percentage of trainees earns less than $900 a mo...

x- 900-1100'
P(x<900) P
150
-200
= PZ<
150
P(Z<-1.33
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x- 900-1100' P(x<900) P 150 -200 = PZ< 150 P(Z<-1.33

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