題組內容

4. (28 points) Consider the following linear regression model describing NCU students' weekly expenditure on coffee as a function of weekly income (NT $). 61cbb40262be9.jpgBased on a surveyed dataset, we obtain the following estimation result
61cbb448a12c8.jpg

(a) (8 points) Please derive the OLS estimators, 61cbb4809b2ce.jpg