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The breaking strengths of cables produced by a certain manufacturer have a mean, µ, of 1850 pounds, and a standard deviation of 60 pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, 35 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1877 pounds. Assume that the population is normally distributed. Can we support, at the 0.01 level of significance, the claim that the mean breaking strength has increased? (Assume that the standard deviation has not changed.) Perform a one-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places, and round your responses as specified in the table. (If necessary, consult a list of formulas.) , : ] The null hypothesis: H The alternative hypothesis: H, :0 口=D ロs口 口マロ The type of test statistic: (Choose one) ローロ The value of the test statistic: (Round to at least three decimal places.) The critical value at the 0.01 level of significance: (Round to at least three Can we support the claim that the mean breaking strength has increased? O No Yes

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Thermodynamics An Engineering Approach

Thermodynamics An Engineering Approach

ISBN: 978-0073398174

8th edition

Authors: Yunus A. Cengel, Michael A. Boles

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Posted Date: October 28, 2020 16:29:30
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