Assignment+3

# Assignment+3 - Assignment 3 NOTICE 1 All assignments should...

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Assignment 3 NOTICE: 1. All assignments should be submitted in hard copies to the collection box 2. The due date for 3 rd assignment is Nov 20, 2:00 pm . Late HWs are NOT accepted. ************************************************************************ Problem1. A production process for steel rods used to reinforce concrete is known to produce rods whose length have a variance of 64 cm. The production machinery has been set to produce rods with a mean of 600 cm in length. These rods are tied into bundles of 40 for shipment to construction sites. a. What is the probability that the average length of a randomly selected bundle is less than 598 cm? b. What is the probability that the average length of a randomly selected bundle is less than 598 cm or more than 601 cm? c. Under what assumptions are the probabilities found in parts (a) and (b) valid? d. If the bundle size is 25 rather than 40, what additional assumption is necessary in order to use the sampling distribution of sample mean e. Suppose that the bundle size is 25. What is the probability of selecting a bundle that

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Assignment+3 - Assignment 3 NOTICE 1 All assignments should...

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