/* Chapter 8, Table 8.1, p. 115 */

capture clear
input byte wgt byte hgt byte age
64      57      8
71      59     10
53      49      6
67      62     11
55      51      8
58      50      7
77      55     10
57      48      9
56      42     10
51      42      6
76      61     12
68      57      9
end

gen int age2=age^2

label variable wgt  "Weight (Y)"
label variable hgt  "Height (X1)"
label variable age  "Age (X2)"
label variable age2 "Age-squared (X3)"


/* Chapter 8, 8.7 Numerical Examples, pp. 124-126 */
reg wgt hgt            /* Model #1 */
reg wgt age            /* Model #2 */ 
reg wgt age2           /* Model #3 */
reg wgt hgt age        /* Model #4 */
reg wgt hgt age2       /* Model #5 */
reg wgt hgt age age2   /* Model #6 */