Probability and Statistics for Engineering and the Sciences
9th Edition
ISBN: 9781305251809
Author: Jay L. Devore
Publisher: Cengage Learning
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Textbook Question
Chapter 7.3, Problem 34E
A sample of 14 joint specimens of a particular type gave a sample
- a. Calculate and interpret a 95% lower confidence bound for the true average proportional limit stress of all such joints. What, if any, assumptions did you make about the distribution of proportional limit stress?
- b. Calculate and interpret a 95% lower prediction bound for the proportional limit stress of a single joint of this type.
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A sample of 56 research cotton samples resulted in asample average percentage elongation of 8.17 and asample standard deviation of 1.42 (“An ApparentRelation Between the Spiral Angle f, the PercentElongation E1, and the Dimensions of the CottonFiber,” Textile Research J., 1978: 407–410). Calculatea 95% large-sample CI for the true average percentageelongation m. What assumptions are you making aboutthe distribution of percentage elongation?
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a.
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Chapter 7 Solutions
Probability and Statistics for Engineering and the Sciences
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