Question: A process produces a fiber whose strength is normally distributed with mean = 65 N/m2 and variance 2 = 482 (N/m2 ) 2 . 3

A process produces a fiber whose strength is normally distributed with mean = 65 N/m2 and variance 2 = 482 (N/m2 ) 2 . 3 (a) Randomly select a fiber from this process. What is the probability that its strength falls below 30.44 N/m2 ? (b) If the mean remains at = 65 N/m2 , what should be so that 95 percent of fibers produced are stronger than 57 N/m2 ?

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