A sociologist was hired by a large city hospital to investigate the relationship between the number of unauthorized days that employees are absent per year and the distance (miles)

between home and work for the employees. A sample of 10 employees was chosen, and the following data were collected.

a. Develop a scatter diagram for these data. Does a linear relationship appear reasonable? Explain.

b. Develop the least squares estimated regression equation.

c. Is there a significant relationship between the two variables? Use α .05.

d. Did the estimated regression equation provide a good fit? Explain.

e. Use the estimated regression equation developed in part

(b) to develop a 95% confidence interval for the expected number of days absent for employees living 5 miles from the company.