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Mathematics 9 Online
OpenStudy (anonymous):

he breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 185 and a variance of 16. The material is considered defective if the breaking strength is less than 175.4 pounds. What is the probability that a single, randomly selected piece of material will be defective

OpenStudy (anonymous):

Will you have to calculate z and look up it up in a table? My best guess.

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