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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?
15 years ago

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Reiny
You will love this page for your type of question,

http://davidmlane.com/hyperstat/z_table.html

Just enter the given data, click the "below" button
15 years ago

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