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.

In Problem 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 asfollows:

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STUDENT 23 5 6 7S9 Ist test grade 98 77 88 80 96 61 66 95 69 Final average 93 78 84 73 84 64 64 95 76