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A researcher used stepwise regression to create regression models to predict BirthRate (births per 1

Question: A researcher used stepwise regression to create regression models to predict BirthRate (births per 1,000) using five predictors: LifeExp (Life expectancy in years), InfMort (infant mortality rate), Density (population density per square kilometer), GDPCap (Gross Domestic Product per capita), and Literate (literacy percent). Interpret these results.

Regression Analysis – Stepwise Selection (best model of each size)

Observations

BirthRate is the dependent variable

Nvar	LifeExp	InfMort	Density	GDPCap	Literate	S	Adj R\[^{2}\]	R\[^{2}\]
1		.0000				6.318	.722	.724
2		.0000			.0000	5.334	.802	.805
3		.0000		.0242	.0000	5.261	.807	.811
4	.5764	.0000		.0311	.0000	5.273	.806	.812
5	.5937	.0000	.6289	.0440	.0000	5.287	.805	.812