Introduction to Statistics and Data Analysis
5th Edition
ISBN: 9781305115347
Author: Roxy Peck; Chris Olsen; Jay L. Devore
Publisher: Brooks Cole
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Textbook Question
Chapter 5.3, Problem 40E
The article referenced in the previous exercise also gave data on the percentage of operating costs covered by park revenues for the 2007–2008 fiscal year.
- a. Find the equation of the least-squares line relating y = Percent of operating costs covered by park revenues and x = Number of employees.
- b. Based on the values of r2 and se, do you think that the least-squares line does a good job of describing the relationship between y = Percent of operating costs covered by park revenues and x = Number of employees? Explain.
- c. The graph at the bottom of the page is a
scatterplot of y = Percent of operating costs covered by park revenues and x = Number of employees. The least-squares line is also shown. Which observations are outliers? Do the observations with the largest residuals correspond to the park districts with the largest number of employees?
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Chapter 5 Solutions
Introduction to Statistics and Data Analysis
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