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The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 170 and a variance of 4. T...Asked by Anonymous
The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 170 and a variance of 4. The material is considered defective if the breaking strength is less than 166 pounds. What is the probability that a single, randomly selected piece of material will be defective?
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Answered by
bobpursley
http://davidmlane.com/hyperstat/z_table.html
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