## Question 427:

1

Below are the results of the Regression Equation from Minitab. The residuals and standardized residuals are near the bottom.

The regression equation is
Age (yr) = 564 - 111 Weight (gm)

Predictor       Coef  SE Coef      T      P
Constant       564.4    115.1   4.90  0.000
Weight (gm)  -111.03    23.16  -4.79  0.000

S = 8.40027   R-Sq = 44.2%   R-Sq(adj) = 42.3%

Analysis of Variance

Source          DF      SS      MS      F      P
Regression       1  1622.4  1622.4  22.99  0.000
Residual Error  29  2046.4    70.6
Total           30  3668.8

Unusual Observations

Weight
Obs    (gm)  Age (yr)    Fit  SE Fit  Residual  St Resid
5    4.98     38.00  11.43    1.52     26.57      3.22R
8    4.80     28.00  31.86    4.34     -3.86     -0.54 X
25    4.92     40.00  18.42    1.97     21.58      2.64R
28    4.80     22.00  31.30    4.24     -9.30     -1.28 X

R denotes an observation with a large standardized residual.
X denotes an observation whose X value gives it large influence.