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DSC 203 Chapters 14-15 Assignments

# DSC 203 Chapters 14-15 Assignments - 1 Chapters 14 and 15...

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1 Chapters 14 and 15: Reading Assignments and Exercises Section 14.1: The Multiple Regression Model and the Least Squares Point Estimates (pages 581-587) Exercises 14.4*, 14.5 Section 14.2: Model Assumptions and the Standard Error (pages 591-593) Section 14.3: 2 R and Adjusted 2 R (pages 593-594) Section 14.4: The Overall F Test (pages 595-596) Exercises 14.11*, 14.12 Section 14.5: Testing the Significance of an Independent Variable (pages 597-600) Exercises 14.17*, 14.18 Section 14.6: Confidence and Prediction Intervals (pages 601-603) Exercises 14.23*, 14.24 Section 15.1: The Quadratic Regression Model (pages 635-640) Exercises 15.3*, 15.4 Answers to Selected Exercises 14.4 a. b l = 5.6128, b 2 = 3.8344 b 1 = 5.6128 implies that we estimate that mean sales price increases by \$5,612.80 for each increase of 100 square feet in house size, when the niceness rating stays constant . b 2 = 3.8344 implies that we estimate that mean sales price increases by \$3,834.40 for each increase in niceness rating of 1, when the square footage remains constant. b. 172.28. From y = 29.347 + 5.6128(20) + 3.8344(8)

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2 14.11 Using the MINITAB output: 1. SSE = 73.6; 2 s = 10.5; s = 3.24164 2. Total Variation = 7447.5 3.
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