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Explain correlation coefficient of determination (R-square) and Adjusted R-square
A computer utility was applied to the data collected in a study of a generalized health index as a function of weight/ height/ ratio, cholesterol, and average nightly number of hours of sleep. Part of the output is shown below.
Independent variables
P-value
R2
Adjusted R2
WT/HT,CH,SLP
0.000
0.812
0.787
WT/HT,CH
0.801
0.784
WT/HT,SLP
0.792
0.775
CH,SLP
0.791
0.774
WT/HT
0.578
0.561
CH
0.667
0.654
SLP
0.699
0.687
Which single variable is the best predictor of generalized health?
a) Weight/height
b) sleep
c) cholesterol
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