Using the data in the accompanying table, estimate the model: Salary = β0 + β1Education + ε, where salary is measured in $ 1,000s and education refers to years of higher education.
a. Construct a 90% confidence interval for the expected salary for an individual who completed 6 years of higher education.
b. Construct a 90% prediction interval for salary for an individual who completed 6 years of higher education.
c. Comment on the difference in the widths of these intervals.