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HW_6_Stat_428_SP09

# HW_6_Stat_428_SP09 - New part d As it turns out TOST takes...

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Statistics 428: Homework #6 Chapter 12 – Part I Note: All scatterplots need to be produced using software, printed out, and included in your homework. Also, if you are using software to find your regression line, you must include that output with your homework. Required problems: To be turned in for credit: 12.9: “The flow rate y (m 3 /min) in a device used for air-quality measurement…” (page 454) 12.16: “The article ‘Characterization of Highway Runoff in Austin, Texas, Area’…” (page 466) You do not need to do part e , but save your work since you’ll need to do this next week! 12.24: “The accompanying data was read from a graph that appeared…” (page 467) You do not need to do part c , but save your work since you’ll need to do this next week! 12.58: “The Turbine Oil Oxidation Test (TOST) and the Rotating…” (page 492) Parts a-c: as in textbook (do not do parts d and e as in the textbook)
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Unformatted text preview: New part d: As it turns out, TOST takes a very long time to perform. Engineers would like to use RBOT to measure oil stability, and use this measured value to estimate a TOST result. Estimate the parameters of a linear regression model that would allow the engineers to estimate TOST. New part e: Carefully explain the difference in interpretation between the sample correlation (r) you found in part a and the estimated slope ( g G ± ) you found in part d. Remember that you must show all work when answering the questions. If the answer to the question is a calculation, be sure to write down the formula you used or describe how you made the calculation. Suggested Problems: The following suggested problems do not need to be turned in: 12.11: “Exercise 16 of Section 12.2 gave data on…” (page 454) 12.19: “The following data is representative of that reported…” (page 466)...
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