Average strength of the population of the wire produce

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The strength of wire produce by company A has mean 4500kg and standard deviation of 200kg company B has a mean of 4000kg and a standard of 300kg A sample of 500 wires of company A and 100 wire of company B are selected at random for testing the strength Find 99 percent confidence interval on the different on the average strength of the population of the wire produce by two companies?

Reference no: EM132039805

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