SOLUTION: The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 4. The material is considered defective if the breaking s

Question 881096: The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 4. The material is considered defective if the breaking strength is less than 160.2 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.)
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
*Note:
z = (160.2-165)/4
P(x < 160.02) = P(z < -4.8/4) = 11.51%
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