The article referenced in the previous exercise also gave data on the percentage of operating costs covered by Representative Age park revenues for the 2007€“ 2008 fiscal year.

a. Find the equation of the least squares regression line relating y = percent of operating costs covered by park revenues and x = number of employees.
b. Calculate the values of r2 and se . Based on these values, do you think that the least squares regression line does a good job of describing the relationship between percentage of operating costs covered by park revenues and number of employees? Explain.
c. The following graph is a scatterplot of these data. 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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Percent of Operating Cost Percent of Operating Cost Number of Covered by Park Number of Covered by Park Employees, x Revenues.y Employeesx Revenues,y 37 19 32 53 31 35 108 95 102 112 43 17 97 36 32 38 131 116 36 36 138 52 Fitted Line Plot Percentage of operating costs 27.71 + 0.2011 number of employees 0F R-Sq R-Sq(adj) 24.1475 53% 0.1% 80 70 60 50 - a 30 20 50 75 100 Number of employees 125 150