Exercise 13 of Chapter 1 presented a sample ofobservations on ultimate tensile strength
Chapter 7, Problem 40(choose chapter or problem)
Exercise 13 of Chapter 1 presented a sample ofobservations on ultimate tensile strength, and Exercise 17 ofthe previous section gave summary quantities and requesteda large-sample confidence interval. Because the sample sizeis large, no assumptions about the population distributionare required for the validity of the CI.a. Is any assumption about the tensile-strength distributionrequired prior to calculating a lower prediction bound for the tensile strength of the next specimen selected usingthe method described in this section? Explain.b. Use a statistical software package to investigate the plausibilityof a normal population distribution.c. Calculate a lower prediction bound with a predictionlevel of 95% for the ultimate tensile strength of the nextspecimen selected.
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