(a) Predict the mean well-being index composite score of all individuals whose commute time is 20 minutes.
(b) Construct a 90% confidence interval for the mean well-being index composite score of all individuals whose commute time is 20 minutes.
(c) Predict the well-being index composite score of Jane, whose commute time is 20 minutes.
(d) Construct a 90% prediction interval for the well-being index composite score of Jane, whose commute time is 20 minutes.
(e) Explain the difference between the predictions made in parts (a) and (c).