Bundle: Introduction to Statistics and Data Analysis, 5th + WebAssign Printed Access Card: Peck/Olsen/Devore. 5th Edition, Single-Term
Bundle: Introduction to Statistics and Data Analysis, 5th + WebAssign Printed Access Card: Peck/Olsen/Devore. 5th Edition, Single-Term
5th Edition
ISBN: 9781305620711
Author: Roxy Peck, Chris Olsen, Jay L. Devore
Publisher: Cengage Learning
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Chapter 5.2, Problem 26E

The sales manager of a large company selected a random sample of n = 10 salespeople and determined for each one the values of x = Years of sales experience and y = Annual sales (in thousands of dollars). A scatterplot of the resulting (x, y) pairs showed a linear pattern.

  1. a. Suppose that the sample correlation coefficient is r = 0.75 and that the average annual sales is y ¯ = 100 . If a particular salesperson is 2 standard deviations above the mean in terms of experience, what would you predict for that person’s annual sales?
  2. b. If a particular person whose sales experience is 1.5 standard deviations below the average experience is predicted to have an annual sales value that is 1 standard deviation below the average annual sales, what is the value of r?
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Chapter 5 Solutions

Bundle: Introduction to Statistics and Data Analysis, 5th + WebAssign Printed Access Card: Peck/Olsen/Devore. 5th Edition, Single-Term

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