The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 155 and a variance of 9. The material is considered defective if the breaking strength is less than 148.4 pounds. What is the probability that a single, randomly selected piece of material will be defective? (You may need to use the standard normal distribution table. Round your answer to four decimal places.)

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 155 and a variance of 9. The material is considered defective if the breaking strength is less
than 148.4 pounds. What is the probability that a single, randomly selected piece of material will be defective? (You may need to use the standard normal distribution table. Round your answer
to four decimal places.)
Transcribed Image Text:The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 155 and a variance of 9. The material is considered defective if the breaking strength is less than 148.4 pounds. What is the probability that a single, randomly selected piece of material will be defective? (You may need to use the standard normal distribution table. Round your answer to four decimal places.)
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