Which of the following is NOT a good reason for including a disturbance term in a regression equation?/ A. To allow for random influences on the dependent variable/ B. To allow for errors in the measurement of the dependent variable/ C. It captures omitted determinants of the dependent variable D. To allow for the non-zero mean of the dependent variable/
1.1 Which of the following is NOT a good reason for including a disturbance term in a regression equation?/
A. To allow for random influences on the dependent variable/
B. To allow for errors in the measurement of the dependent variable/
C. It captures omitted determinants of the dependent variable
D. To allow for the non-zero mean of the dependent variable/
1.2 Consider the equation Y = B1 + B2X2 + u. A null hypothesis of H0: B2 = 0 means that/
A. X2 has no effect on the expected value of Y /
B. B2 has no effect on the expected value of Y/
C. X2 has no effect on the expected value of B2 /
D. Y has no effect on the expected value of X2/
1.3 The OLS residuals in the multiple regression model/
A. can be calculated by subtracting the fitted values from the actual values /
B. are zero because the predicted values are another name for
C. are typically the same as the population regression function errors /
D. cannot be calculated because there is more than one explanatory variable
1.4 b2 in the equation, Y = b1 + b2X, is calculated by the following formula:/
- A.
- B.
- C. None of the three formulas is correct/ Nie een van die drie formules is korrek nie
- D.
1.5 The residual from the OLS regression model is /
A. the difference between the fitted value Ŷ and the mean Ῡ/
B. the difference between the actual Y value and the mean Ῡ/
C. the difference between the actual Y value and the fitted value Ŷ/
D. the square of the difference between the fitted value Ŷ and the mean Ῡ/
1.13 If the p-value is greater than α in a two-tail test/
A. α should be changed/ moet α verander word
B. the null hypothesis should not be rejected/
C. none of the statements is correct/ D. the null hypothesis should be rejected/
E. a one-tail test should be more appropriate/
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