Use the following information from a multiple regression analysis. n=15 b1=2 b2=6 Sb1=1.4 Sb2=0.5 a. Which variable has the largest​ slope, in units of a t​ statistic? b. Construct a 90​% confidence...

a.

Which variable has the largest​ slope, in units of a t​ statistic?

b.

Construct a

confidence interval estimate of the population​ slope,

c.

At the

level of​ significance, determine whether each independent variable makes a significant contribution to the regression model. On the basis of these​ results, indicate the independent variables to include in this model.