What is the probability average length of the sample board

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An automatic saw at a local lumber mill cuts 2 by 4 to an average length of 120 inches. However, because the saw is a mechanical device, not all the boards are 120 inches long. In fact, the distribution of lengths has a various of 0.64. The saw operator took a sample of 36 boards. What is the probability the average length of the sample board s is more than 120.2 inches?

Reference no: EM13212485

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