Ch. 7 Problem 29

( a ) write out the linear model

( b ) Interpret the intercept

The intercept -29.901 muders per million is for adjusting the height of the regression line.

( c ) Interpret the slope

For each additional percentage increase in poverty, we expect murders per million to be lower on average by 2.559.

( d ) Interpret R²

Poverty level ex- plains 70.52% of the variability in murder rates in metropolitan areas.

( e ) Calculate the correlation coefficient

sqrt(.7052) = .839761871009