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Chapter 12: Linear Regression and Correlation

Expert-verified
Introductory Statistics
Pages: 679 - 742
Introductory Statistics

Introductory Statistics

Book edition OER 2018
Author(s) Barbara Illowsky, Susan Dean
Pages 902 pages
ISBN 9781938168208

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100 Questions for Chapter 12: Linear Regression and Correlation

  1. 58. Piece-rate systems are widely debated incentive payment plans. In a recent study of loan officer effectiveness, the following piece-rate system was examined:

    Found on Page 720

  2. A vacation resort rents SCUBA equipment to certified divers. The resort charges an up-front fee of $25and another fee of $12.50an hour.

    Found on Page 712

  3. Is the following an example of a linear equation?

    Found on Page 680

  4. A specialty cleaning company charges an equipment fee and an hourly labor fee. A linear equation that expresses the total amount of the fee the company charges for each session is y=50+100x

    Found on Page 714

  5. For a given line of best fit, you compute that r = 0 using n = 100 data points. Can the line be used for prediction? Why or why not?

    Found on Page 695

  6. A specialty cleaning company charges an equipment fee and an hourly labor fee. A linear equation that expresses the total amount of the fee the company charges for each session is y=50+100x

    Found on Page 714

  7. Data are collected on the relationship between the number of hours per week practicing a musical instrument and scores on a math test. The line of best fit is as follows: ŷ=72.5+2.8xWhat would you predict the score on a math test would be for a student who practices a musical instrument for five hours a

    Found on Page 697

  8. Identify the potential outlier in the scatter plot. The standard deviation of the residuals or errors is approximately 8.6

    Found on Page 699

  9. Due to erosion, a river shoreline is losing several thousand pounds of soil each year. A linear equation that expresses the total amount of soil lost per year is y=12,000x

    Found on Page 714

  10. The data points for the graph from the third exam/final exam example are as follows: (1, 5), (2, 7), (2, 6), (3, 9), (4, 12), (4, 13), (5, 18), (6, 19), (7, 12), and (7, 21). Remove the outlier and recalculate the line of best fit. Find the value of ŷ when x = 10.

    Found on Page 701

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