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Question 4 A large consignment of AA 6061 T6 aluminum alloy bars was received by a purchaser. To verify that the consignment met his specifications, the purchaser sent twelve (12) of the bars to an independent testing company for determination of tensile properties. The yield strength results, in MPa, determined for the twelve (12) bar samples were as follows: 257 252 255 257 256 250 252 260 253 258 257 Using this yield strength results: (a) Calculate the mean and standard deviation for the sample. (b) Estimate the standard deviation of the mean (SDOM) for the sample. 253 (c) Determine the 95% confidence interval on the mean yield strength for the consignment of bars.

Question 4 A large consignment of AA 6061 T6 aluminum alloy bars was received by a purchaser. To verify that the consignment met his specifications, the purchaser sent twelve (12) of the bars to an independent testing company for determination of tensile properties. The yield strength results, in MPa, determined for the twelve (12) bar samples were as follows: 257 252 255 257 256 250 252 260 253 258 257 Using this yield strength results: (a) Calculate the mean and standard deviation for the sample. (b) Estimate the standard deviation of the mean (SDOM) for the sample. 253 (c) Determine the 95% confidence interval on the mean yield strength for the consignment of bars.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question 4 A large consignment of AA 6061 T6 aluminum alloy bars was received by a purchaser. To verify that the consignment met his specifications, the purchaser sent twelve (12) of the bars to an independent testing company for determination of tensile properties. The yield strength results, in MPa, determined for the twelve (12) bar samples were as follows: 257 252 255 257 256 250 252 260 253 258 257 Using this yield strength results: (a) Calculate the mean and standard deviation for the sample. (b) Estimate the standard deviation of the mean (SDOM) for the sample. 253 (c) Determine the 95% confidence interval on the mean yield strength for the consignment of bars.
Transcribed Image Text:Question 4 A large consignment of AA 6061 T6 aluminum alloy bars was received by a purchaser. To verify that the consignment met his specifications, the purchaser sent twelve (12) of the bars to an independent testing company for determination of tensile properties. The yield strength results, in MPa, determined for the twelve (12) bar samples were as follows: 257 252 255 257 256 250 252 260 253 258 257 Using this yield strength results: (a) Calculate the mean and standard deviation for the sample. (b) Estimate the standard deviation of the mean (SDOM) for the sample. 253 (c) Determine the 95% confidence interval on the mean yield strength for the consignment of bars.
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