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Problem 1 209ts Suppose that the length of iron rods from a certain factory follows the normal distribution with known population standard deviation 02: 0.2

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Problem 1 209ts Suppose that the length of iron rods from a certain factory follows the normal distribution with known population standard deviation 02: 0.2 m, but unknown mean [1. Construct a 95% confidence interval for the population mean if a random sample of n = 16 of these iron rods has sample mean 87: 6 m

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