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Question 1 A textile ber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with

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Question 1 A textile ber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. The company wishes to test the hypothesis Ha: [11:12 against H1: y

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