Question: Refer to the information attached First, add a variable to change the type of bus (diesel or gasoline) to a qualitative variable. If the bus

Refer to the information attached First, add a variable to change the type of bus (diesel or gasoline) to a qualitative variable. If the bus type is diesel, then set the qualitative variable to 0. If the bus type is gasoline, then set the qualitative variable to 1. Develop a regression equation using statistical software with maintenance as the dependent variable and age, miles, and bus type as the independent variables. a. Write out the multiple regression equation analysis. Discuss each of the variables. b. Determine the value of R2. Interpret. c. Develop a correlation matrix. Which independent variables have strong or weak correlations with the dependent variable? Do you see any problems with multicollinearity? d. Conduct the global test on the set of independent variables. Interpret. e. Conduct a test of hypothesis on each of the independent variables. Would you consider deleting any of the variables? If so, which ones? f. Rerun the analysis until only significant regression coefficients remain in the analysis. Identify these variables. g. Develop a histogram or a stem-and-leaf display of the residuals from the final regression equation developed in part (f). Is it reasonable to conclude that the normality assump-tion has been met? h. Plot the residuals against the fitted values from the final regression equation developed in part (f) against the fitted values of Y. Plot the residuals on the vertical axis and the fit-ted values on the horizontal axis.

Age	Miles	Type
X₃	X₄	X₅
7	853	Diesel
10	883	Diesel
10	822	Diesel
10	865	Gasoline
7	751	Gasoline
8	870	Diesel
5	780	Gasoline
9	857	Gasoline
3	818	Gasoline
8	869	Gasoline
9	848	Diesel
10	845	Gasoline
10	885	Gasoline
12	838	Diesel
8	760	Diesel
3	741	Diesel
10	859	Gasoline
8	826	Gasoline
3	806	Gasoline
9	858	Diesel
2	785	Gasoline
7	828	Diesel
11	980	Gasoline
8	857	Diesel
9	803	Diesel
6	819	Diesel
6	821	Diesel
3	798	Gasoline
9	815	Diesel
2	757	Diesel
10	1008	Diesel
9	831	Diesel
6	849	Diesel
8	839	Diesel
8	812	Diesel
9	809	Diesel
4	864	Gasoline
11	859	Diesel
2	815	Diesel
6	799	Diesel
9	844	Diesel
9	832	Gasoline
5	842	Gasoline
2	792	Diesel
9	775	Gasoline
9	882	Diesel
7	874	Diesel
6	837	Gasoline
5	774	Diesel
1	823	Diesel
8	790	Diesel
4	800	Diesel
7	827	Gasoline
6	830	Diesel
14	895	Diesel
6	804	Gasoline
8	866	Gasoline
9	842	Diesel
8	851	Diesel
10	835	Diesel
7	866	Diesel
4	846	Gasoline
2	802	Diesel
11	847	Diesel
6	856	Diesel
5	799	Diesel
4	827	Diesel
7	817	Diesel
7	842	Diesel
7	815	Diesel
6	784	Gasoline
4	817	Diesel
6	816	Diesel
9	816	Gasoline
10	827	Diesel
4	806	Diesel
6	819	Gasoline
10	836	Diesel
4	757	Diesel
4	817	Gasoline

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