1. Use backward elimination to find useful predictors and build a final multiple regression model. Please download data from life.xlsx in the Datasets folder.
The dataset containss some variables related to states of U.S.
Please treat life expectancy as the response variable y.
Potential predictors xi:population;
per capita income;
murder rate;
% of high-school graduates;
mean number of days with min temperature < 32 degrees;
land areas in squared miles;
illiteracy.
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