BUS 660 BUS660 Week 3 Homework Answers

4-13 Students in a management science class have just received

 their grades on the first test. The instructor

 has provided information about the first test grades

 in some previous classes as well as the final average

 for the same students. Some of these grades have

 been sampled and are as follows:

4-14 Using the data in Problem 4-13, test to see if there is

 a statistically significant relationship between the

 grade on the first test and the final average at the

 0.05 level of significance. Use the formulas in this

 chapter and Appendix D.

4-15 Using computer software, find the least squares regression

 line for the data in Problem 4-13. Based on

 the F test, is there a statistically significant relationship

 between the first test grade and the final average

 in the course?

 4-19 Bus and subway ridership in Washington, D.C., during

 the summer months is believed to be heavily tied

 to the number of tourists visiting the city. During the

 past 12 years, the following data have been obtained: