Walter tutors students in Econometrics.  He boasts to you that the students who he tutored last semester had an average midterm grade of 90%, while the average midterm grade of the students who didn’t receive tutoring was 75%.  He says that the effect of his tutoring is a 15% increase in test scores. Is 15% likely the true effect of tutoring on test scores?  Why or why not?

What is another term for the assumption that

What is the expression for , the OLS estimated intercept?

In the equation  , c denotes consumption and i denotes income.  What is the residual for the 5th observation if , , and ?

The following table contains the results of a regression using data on over 7,000 students in the United States, who all took the same standardized Reading and Math Tests.  The researcher estimated three regressions.  In all three, the dependent variable is the student’s score on the Math section   (1) (2) (3) Reading Score 0.714 0.651 0.654   (0.0082) (0.00846) (0.00839)         Mother’s Education   0.421 0.415     (0.0463) (0.0451)         Father’s Education   0.492 0.435     (0.0414) (0.0405)         Female     -2.482       (0.147)         Asian     2.271       (0.332)         Black     -2.373       (0.289)         Constant 15.15 6.076 8.137   (0.432) (0.596) (0.589) N 7430 7430 7430 Note that this table also includes the estimated constant term. What is the predicted Math score of a student who scores a 120 on the Reading Section?

The constants of econometric models are referred to as 

Which of the following terms measures the association between two variables? 

A 5’9″, 210 lb. female patient is electively intubated due to a impending respiratory failure.  Which of the following tidal volumes would be appropriate for the patient?

A substance has [H₃O⁺] = 1.0 × 10⁻⁷ M, like pure water or blood plasma at neutral pH. This solution is:

Which of the following is a Brønsted-Lowry acid, relevant in gastric secretions?