# Question

A college's economics department is attempting to determine if verbal or mathematical proficiency is more important for predicting academic success in the study of economics. The department faculty have decided to use the grade point average (GPA) in economics courses for graduates as a measure of success. Verbal proficiency is measured by the SAT verbal and the ACT English entrance examination test scores. Mathematical proficiency is measured by the SAT mathematics and the ACT mathematics entrance examination scores. The data for 112 students are available in a data file named Student GPA. The designation of the variable columns is presented in the Chapter 11 appendix. You should use your local statistical computer program to perform the analysis for this problem.

a. Prepare a graphical plot of the economics GPA versus each of the two verbal proficiency scores and each of the two mathematical proficiency scores. Which variable is a better predictor? Note any unusual patterns in the data.

b. Compute the linear model coefficients and the regression analysis statistics for the models that predict economics GPA as a function of each verbal and each mathematics score. Using both the SAT mathematics and verbal measures and the ACT mathematics and English measures, determine whether mathematical or verbal proficiency is the best predictor of economics GPA.

c. Compare the descriptive statistics-mean, standard deviation, upper and lower quartiles, and range-for the predictor variables. Note the differences and indicate how these differences affect the capability of the linear model to predict.

a. Prepare a graphical plot of the economics GPA versus each of the two verbal proficiency scores and each of the two mathematical proficiency scores. Which variable is a better predictor? Note any unusual patterns in the data.

b. Compute the linear model coefficients and the regression analysis statistics for the models that predict economics GPA as a function of each verbal and each mathematics score. Using both the SAT mathematics and verbal measures and the ACT mathematics and English measures, determine whether mathematical or verbal proficiency is the best predictor of economics GPA.

c. Compare the descriptive statistics-mean, standard deviation, upper and lower quartiles, and range-for the predictor variables. Note the differences and indicate how these differences affect the capability of the linear model to predict.

## Answer to relevant Questions

The administrator of the National Highway Traffic Safety Administration (NHTSA) wants to know if the different types of vehicles in a state have a relationship to the highway death rate in the state. She has asked you to ...A prestigious national news service has gathered information on a number of nationally ranked private colleges; these data are contained in the data file Private Colleges. You have been asked to determine if the ...The federal nutrition guidelines prepared by the Center for Nutrition Policy and Promotion of the U.S. Department of Agriculture stress the importance of eating substantial servings of fruits and vegetables to obtain a ...Compute the coefficients b1 and b2 for the regression model y`i = b0 + b1x1i + b2x2i given the following summary statistics. a. rx1y = 0.60, rx2y = 0.70, rx1x2 = 0.50, sx1 = 200, sx2 = 100, sy = 400 b. rx1y = -0.60, rx2y = ...Use the data in the data file named Student GPA, which is described in the Chapter 11 appendix, to develop a model to predict a student's grade point average in economics. Begin with the variables ACT scores, gender, and ...Post your question

0