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Solved: The article “Case Study Based Instruction of DOE

Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi

Problem 8SE Chapter 9

Statistics for Engineers and Scientists | 4th Edition

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Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi

Statistics for Engineers and Scientists | 4th Edition

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Problem 8SE

The article “Case Study Based Instruction of DOE and SPC” (J. Brady and T. Allen, The American Statistician, 2002:312–315) presents the result of a 24−1 factorial experiment to investigate the effects of four factors on the yield of a process that manufactures printed circuit boards. The factors were A: transistor power output (upper or lower specification limit), B: transistor mounting approach (screwed or soldered), C: transistor heat sink type (current or alternative configuration), and D: screw position on the frequency adjustor (one-half or two turns). The results are presented in the following table. The yield is a percent of a theoretical maximum.

a.   Estimate the main effects of each of the four factors.

b.  Assuming all interactions to be negligible, pool the sums of squares for interaction to use in place of an error sum of squares.

c.   Which of the four factors, if any, can you conclude to affect the yield? What is the P-value of the relevant test?

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Chapter 4: Microbial growth  Energy Source: o Photoautotroph:sunlight o Photoheterotroph: sunlight o Chemolithoautotroph: Inorganic o Chemoorganoheterotroph: Organic  Carbon Source:  -CO2  Organic Compounds  CO2  Organic Compounds  Nutritional Factors o Required elements: C, O, H, N, S, K,...

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Chapter 9, Problem 8SE is Solved
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Textbook: Statistics for Engineers and Scientists
Edition: 4th
Author: William Navidi
ISBN: 9780073401331

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