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A researcher used stepwise regression to create regression ...


Sent to Math Experts May 16 4:21 p.m.

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.

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Subject: Business statistics

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May 16 4:50 p.m. (28 minutes and 45 seconds later)
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Hello Customer (name blocked for privacy)!

The R2 values are all quite high for each of the stepwise regression pairs. Therefore, these variables regress very well with each other. The p-values for InfMort are almost zero, so InfMort is definitely linearly related in the regression model. The p-values for Literate are also almost zeros, so this variable is also is linearly related in the regression model. The p-values for GDPCap are all less than 0.05, therefore, at 5% level of significance there is sufficient evidence to conclude that these two variables have a linear relationship with the dependant variable. The p-values for LifeExp and Density are greater than 0.05, therefore, these variables are not linearly related to the dependant variable.

Sincerely,
Sk1llz

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