mple linear regression model is used and some results for the model is given: a) Is it plausible that the true intercept for the model is 2.0? Why or why not? (hint: using interval for intercept) b) If 2.0 is the real intercept for the model, does it make contextual sense? Explain why it is or why it is not. c) Using the model, calculate the number of hours needed to achieve a GPA of 4.0. Then explain why this estimate number of hours is biased. (hint: think about Y).
We wants to assess the relationship between overall GPA (4.0 scale) and amount of time spent weekly on school work of 50 college students. Simple linear regression model is used and some results for the model is given:
a) Is it plausible that the true intercept for the model is 2.0? Why or why not? (hint: using interval for intercept)
b) If 2.0 is the real intercept for the model, does it make contextual sense? Explain why it is or why it is not.
c) Using the model, calculate the number of hours needed to achieve a GPA of 4.0. Then explain why this estimate number of hours is biased. (hint: think about Y).
For 50 college students, a study is conducted to assess the relationship between overall GPA (4.0 scale) and the amount of time spent weekly on schoolwork
| Dependent variable | GPA |
| Independent variable | Hour |
| Term | coef | SE Coef | Tvalue | p-value | VIF |
| constant | 1.931 | 0.116 | 16.66 | 0.0000 | |
| hour | 0.05379 | 0.00475 | 11.33 | 0.0000 | 1.0 |
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