Andrew Teh is interested in studying the impact of the number of books students referred to in a economics course and the number of lectures they attended on the final grade on the course. He randomly sampled 25 students and the data are given below.
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|
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 |
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- Determine the overall significance of the relationship at the 0.05 level of significance?
- Determine the significance of each independent variable? What are your conclusions at the 0.05 level of significance?
- How much of the variation in the final grade does the model in part (a) explain?
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