Using the data in the accompanying table, estimate the m odel: Salary = 0 + 1Education

Using the data in the accompanying table, estimate the m odel: Salary = β 0 + β1Education + ε , where salary is measured in $ 1,000s and education refers to years o f higher education.

3 4 6 2 5 4 8 0 40 53 80 42 70 50 110 38

a. Construct a 90% confidence interval for the expected salary for an individual w ho completed 6 years o f higher education.

b. Construct a 90% prediction interval fo r salary fo r an individual w ho com pleted 6 years o f higher education.

c. Com ment on the difference in the w idths o f these intervals.