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breaking strengths of cables produced by a certain manufacturer have historically had a mean of 1875 pounds and a ndard deviation of 50 pounds. The

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breaking strengths of cables produced by a certain manufacturer have historically had a mean of 1875 pounds and a ndard deviation of 50 pounds. The company believes that, due to an improvement in the manufacturing process, the an breaking strength, u, of the cables is now greater than 1875 pounds. To see if this is the case, 150 newly nufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1878 pounds. Can support, at the 0.05 level of significance, the claim that the population mean breaking strength of the newly- ufactured cables is greater than 1875 pounds? Assume that the population standard deviation has not changed. orm a one-tailed test. Then complete the parts below. y your intermediate computations to three or more decimal places, and round your responses as specified below. (If essary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H. O P Ho : I X S p H, :0 b) Determine the type of test statistic to use. (Choose one) V 0=0 050 020 c) Find the value of the test statistic. (Round to three or more decimal places.) OXO 0 d) Find the critical value. (Round to three or more decimal places.) X ? e) Can we support the claim that the population mean breaking strength of the newly-manufactured cables is greater than 1875 pounds

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