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Bad model? A student who has created a linear model is

ISBN: 9780321986498 70

Solution for problem 20E Chapter 8

Stats: Data and Models | 4th Edition

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Stats: Data and Models | 4th Edition

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Problem 20E

Problem 20E

Bad model? A student who has created a linear model is disappointed to find that her R2 value is a very low 13%.

a) Does this mean that a linear model is not appropriate? Explain.

b) Does this model allow the student to make accurate predictions? Explain.

Step-by-Step Solution:
Step 1 of 3

STAT 2004 WEEK 14 REVIEW: T-test  Use a T-test when sigma is unknown.  Use cutoffs to test, not p-values. HYPOTHESIS TESTING RATIONALE  Make an assumption. Is what you observed likely or unlikely  Compare what you observe to what you expect. CHI-SQUARE TEST  How different is what we observed from what we expected 2  For each category, calculate (observed−expected) . Add these values expected together for the chi-square value.  The degrees of freedom for a chi-square value is the number of categories minus 1. o Look up the actual chi-square value on the table. o Is the ch

Step 2 of 3

Step 3 of 3

ISBN: 9780321986498

This textbook survival guide was created for the textbook: Stats: Data and Models , edition: 4. This full solution covers the following key subjects: model, explain, Linear, Find, created. This expansive textbook survival guide covers 12 chapters, and 679 solutions. Since the solution to 20E from 8 chapter was answered, more than 316 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 20E from chapter: 8 was answered by , our top Statistics solution expert on 08/30/17, 07:04AM. The answer to “Bad model? A student who has created a linear model is disappointed to find that her R2 value is a very low 13%.a) Does this mean that a linear model is not appropriate? Explain.________________b) Does this model allow the student to make accurate predictions? Explain.” is broken down into a number of easy to follow steps, and 45 words. Stats: Data and Models was written by and is associated to the ISBN: 9780321986498.

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Bad model? A student who has created a linear model is