Question

Question 15

1. Using the table below, which model is best for predicting platelet count:

   Model	Explanatory variables	P-value for gestational age	R2	Adjusted R2	AIC
   Model i	Gestational age	0.497	0.0027	-0.0031	11.72
   Model ii	Gestational age, birthweight	0.021	0.0931	0.0825	11.63
   Model iii	Gestational age, birthweight, pneumothorax	0.002	0.1423	0.1271	11.59
   Model iv	Gestational age, birthweight, pneumothorax	0.004	0.1431	0.1229	11.60
   	a.	Model iii, because the adjusted R2 is closest to 1.
   	b.	Model iv, because the R2 is closest to 1.
   	c.	Model i, because the AIC is largest.
   	d.	Model i, because the p-value for gestational age is the largest.

Answer 1

Model iv, because the R² is closest to 1.

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