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The Pitney Pipe Company is one of several domestic manufactures of PVC pipe. The quality control department sampled 600 10-foot lengths. For each sample they measured the outside diameter. The mean was 14.0 inches with a standard deviation of.2 inches. How many samples will have a diameter between 13.7 inches and 14.5 inches? How many samples will have a diameter less than 14.2 inches?

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