A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 154.2-cm and a stan

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A Company Produces Steel Rods The Lengths Of The Steel Rods Are Normally Distributed With A Mean Of 154 2 Cm And A Stan 1 (42.47 KiB) Viewed 9 times

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 154.2-cm and a standard deviation of 1.2-cm. For shipment, 28 steel rods are bundled together. Find P57, which is the average length separating the smallest 57% bundles from the largest 43% bundles. PS7 = -cm Enter your answer as a number accurate to 2 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted. Question Help: Video Submit Question Question 4 0/2 pts 32 Details A manufacturer knows that their items have a normally distributed length, with a mean of 12.9 inches, and standard deviation of 2.5 inches. If 25 items are chosen at random, what is the probability that their mean length is less than 12.7 inches? P(Z < 12.7)