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A factory machine is producing Jeans to the length of 49cm. The standard deviation of...

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A factory machine is producing Jeans to the length of 49cm. The standard deviation of thepopulation is taken to be 0.3cm. A sample of 50 pairs of jeans is taken and is found to have amean length of 48cm. Based on a 95% Confidence level interval, should the machine be checked and adjusted? [5]

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