7 An apartment is selected at random It is 1252. 5 square feet In area which means that it is SD(s) above the average size among all the apartments being studied Another way of expressing the relative size of this apartment is that it is at the percentile among all apartments. 3. Using regression, we can predict the apartment from #6 will have a rental price that is SD(s) above average. Expressed as a dollar amount, this is S Expressed as a percentile rank, this is the percentile ofall the rental prices. Note: If you did #7 and #3 correctly, the percentile predicted percentile rank for price has moved closer to the median (50th percentile) than the percentile rank for area was. This is an example of the regression eect