1. If the variance of the error term decreases as X increases, this is:
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2. Which of the following tests is NOT used for detecting heteroscedasticity?
Select the incorrect test.
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3. In the classical linear regression model, what does homoscedasticity mean?
Choose the correct meaning of homoscedasticity.
Hint
4. The main difference between WLS and GLS is:
Choose the correct distinction.
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5. In the presence of heteroscedasticity, the usual t and F tests:
Choose the correct statement.
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6. Which of the following is a real-world example of heteroscedasticity?
Select the most appropriate example.
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8. In a regression model, the presence of outliers can cause:
Choose the correct answer.
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9. Which of the following is a graphical sign of heteroscedasticity in a residual plot?
Identify the visual indication of heteroscedasticity.
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10. The Goldfeld-Quandt test is used to:
Identify the purpose of the test.
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11. In the context of heteroscedasticity, BLUE stands for:
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12. Which of the following best defines heteroscedasticity?
Select the correct definition of heteroscedasticity.
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13. Which of the following is an informal method of detecting heteroscedasticity?
Identify the informal method.
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14. In the presence of heteroscedasticity, the variance of OLS estimators is:
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15. Which of the following is NOT a source of heteroscedasticity?
Select the correct answer.
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16. Which of the following is a cause of heteroscedasticity?
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17. Heteroscedasticity is more likely to occur in:
Select the correct data type.
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19. In the presence of heteroscedasticity, OLS estimators are:
Choose the correct property of OLS estimators.
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20. In WLS method weights are:
Identify the appropriate weights.
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21. Which of the following is a formal test for detecting heteroscedasticity?
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22. If the variance of the error term increases as the value of X increases, this is an example of:
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23. Which of the following is NOT a consequence of heteroscedasticity?
Select the incorrect consequence.
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24. In the Goldfeld-Quandt test, the data is typically divided into:
Choose the correct procedure.
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25. What is the main purpose of Weighted Least Squares (WLS)?
Identify the purpose of WLS.
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26. Which estimator remains unbiased in the presence of heteroscedasticity?
Choose the correct answer.
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27. The presence of heteroscedasticity affects:
Choose the correct statement.
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28. Which method minimizes the weighted sum of squared residuals?
Identify the estimation method.
Hint
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