The updated to the Task Force Report on Blood Pressure control and children [14] reported the observed 90th percentile of SBP in single years of age from age 1 to 17 based on prior studies. Suppose we seek a more efficient way to display the data and shoes many are regression to accomplish this task. Fits a regression line related age to SBP, using the data in the table.
What is the predicted blood-pressure is for an average 13-year-old boy as estimated from the regression line? What is the standard error of the estimate? What is it for a 17-year-old boy?