CLASS EXAMPLE FOR MODEL VALIDATION AND SELECTION
Example: Surgical Unit. A hospital surgical unit wanted to predict survival in patient undergoing a liver
operation. A random sample of 108 patients we
CLASS EXAMPLE FOR MEASURES OF INFLUENCE AND OUTLIERS
Example: Body Fat. Response =body fat, we will use 2 predictors: triceps thickness X1, and thigh
circumference x2.
Regression Analysis: bodyfat ver
MULTICOLLINEARITY, ITS EFFECTS AND DIAGNOSTICS (7.6 and 9.5)
How does the correlation of explanatory variables affect regression models?
Example: (uncorrelated explanatory variables). Work crew produc
BODY FAT LECTURE EXAMPLE INTERACTION MODELS (8.2)
Body fat of 20 people was recorded along with the circumferences of their triceps (X1) thigh (X2), and midarm
(X3). We want to model the body fat as a
MULTWLE REM-1.36900 I
SLRM one 'PREDICXOR 09w.qu
y = 13.. 1- gm + a one vmmoe. newt.
77 1 MON 39 m swim,
mfomse pwétukoz. 10 BE USEFUL.
EXAMPLE -. Y = sum»! , X = 739:!!!» 0:- cinnamon
QURH MN 36
STAT 757 QUALITATIVE AND QUANTITATIVE VARIABLES IN REGRESSION
DUMMY VARIABLES
EXA L PLE: Innovation in insurance. Relate the speed with which a particular insurance innovation is adopted (Y)
to the s