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Please answer the following questions about statistics/ En Izod impact test 1was performed on 2D specimens of PVC pipe. The sample mean is X=1.25 and

Please answer the following questions about statistics/

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En Izod impact test 1was performed on 2D specimens of PVC pipe. The sample mean is X=1.25 and the sample standard deviation is S=D.25. The engineer 1Islrishes to use a 95% Cl tocheck the claim that the standard deviation ofthe Izod impact isgreater than {1.15. a. What is the population parameterthe engineer should estimate? b. What is the point estimator obtained from the sample? c. Develop an appropriate 95% CI for the engineer to use. d. Is the claim plausible? Whv or whv not

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