Question: a. What fraction of the variation in salaries can be explained by the fact that some employees have more experience than others?
b. What salary would you expect for an individual with 8 years of experience?
c. Find the 95% confidence interval for the salary of a new individual (from the same population from which the data were drawn) who has 8 years of experience.
d. Find the 95% confidence interval for the mean salary for those individuals in the population who have 8 years of experience.