I need an explanation

For parts a) and b), assume that the meanofcomposite ACT scores is 20 and the standard deviation is 6.(Note: the ACT is a common standardized test used for college admissions decisions.)

4 Mail 7314 PM Wed Dec 9 ? 76% - learnus-east1-prod-fleet02xythos.content.blackboardcdn.com a) You have a hypothesis that amount of time spent studying has a linear relationship with performance on the ACT. When you estimate the parameters of your model, you nd that error variance is 6. What is the R- squared for your model (2 points)? b) Imagine that another researcher (Researcher B) believed that the relationship between time spent studying is quadratic in form (i.e., takes the form Y = a + sz). When Researcher B estimates the parameters of their model, they nd that the error variance is 8. What is R-squared for researcher B's model (2 points)? 0) Based on your answers to parts a and b above, which model better accounts for the data, yours or Researcher B's? Why? In your explanation, be specic about what Rsquared captures about a model (3