A student is interested in studying the impact of number of books referred by students on a statistics course and the number of lectures they attended on the final grade on the course. A sample of 25 students is selected and the data is given below.

BOOKS	ATTEND	GRADE
2	17	60
3	18	54
1	17	62
5	20	59
2	12	44
1	13	40
3	17	96
4	19	90
5	22	97
2	22	54
5	22	91
1	12	48
3	18	91
1	12	65
4	21	82
5	14	61
3	18	54
3	13	46
1	8	64
5	22	90

a. Use theFtest to determine the overall significance of the relationship. What is your conclusion

at the 0.05 level of significance? Use thettest to determine the significance of each independent

variable? What are your conclusions at the 0.05 level of significance?

b. How much of the variation in the final grade does the model in part (a) explain?