3. A physical education teacher, as part of a master 3. ’s thesis, obtained data on a sizable sample of males for whom heights both at age 10 and as adults were known. The following are the summary statistics for this sample:

(a) Use the values above to compute intercept and slope for predicting adult height from height at age 10 (round to the second decimal place); state the regression equation, using the form of Formula (8.1).

(b) With this regression equation, predict the adult height for the following 10-year-olds:
Jean P. (42.5 in.), Albert B. (55.3 in.), and Burrhus S. (50.1 in.).

(c) Consider Jean’s predicted adult height. In what sense is that value a mean?