1. Two events, A and B, are said to be mutually exclusive if:
Correct : D. P(A and B) = 0
2. A Type I error occurs when we:
Correct : B. reject a true null hypothesis
3. What is the meaning of the term "heteroscedasticity"?
Correct : A. The variance of the errors is not constant
4. What would be then consequences for the OLS
estimator if heteroscedasticity is present in a regression model but ignored?
Correct : C. It will be inefficient
5. Which one of the following is NOT a plausible remedy for near multicollinearity?
Correct : D. Take logarithems of each of the variables
6. What will be the properties of the OLS estimator in the presence of multicollinearity?
Correct : A. It will be consistent unbiased and efficient
7. A sure way of removing multicollinearity from the model is to
Correct : B. Drop variables that cause multicollinearity in the first place
8. Autocorrelation is generally occurred in
Correct : B. Time series data
9. The regression coefficient estimated in the presence of autocorrelation in the sample data are NOT
Correct : C. Efficient estimators
10. In the regression function y=α + βx +c
Correct : A. x is the regressor
11. The coefficient of determination, r2 shows
Correct : A. Proportion of the variation in the dependent variable Y is explained by the independent variable X
12. BLUE is
Correct : A. Best Linear Unbiased Estimator
13. Data on one or variables collected at a given point of time
Correct : D. Cross-section data
14. The violation of the assumption of constant variance of the residual is known as
Correct : A. Heteroscedasticity
15. Formula of coefficient determination is
Correct : C. 1-RSS/TSS
16. In confidence interval estimation, α = 5%, this means that this interval includes the true β with
probability of
Correct : D. 95%
17. Consider a large population with a mean of 160 and a standard deviation of 25. A random sample of size 64 is taken from this population. What is the standard deviation of the sample mean?
Correct : A. 3.125
18. In the case of multicollinearity which test will be insignificant?
Correct : B. t test
19. Hetroscedasticity is generally occurred in
Correct : A. Cross-section data
20. When there are both qualitative and quantitative variables are there in the model,
Correct : B. ANCOVA
21. When is the problem of dummy variable trap occur?
Correct : D. Both a and c
22. Durbin Watson test is associated with:
Correct : C. Autocorrelation
23. All are the types of specification errors EXCEPT:
Correct : D. over identified
24. White's test is used for the detection of ----------
-?
Correct : B. hetroscedasticity
25. Which one is not the assumption of OLS?
Correct : A. Perfect Multicollinearity
26. Scaling a dependent variable in log form in the log-lin model will------------
Correct : C. change the intercept but not the slope
27. Individual respondents, focus groups, and panels of respondents are categorised as
Correct : A. Primary Data Sources
28. The scale applied in statistics which imparts a difference of magnitude and proportions is
considered as
Correct : C. Ratio Scale
29. Homogeneity of three or more population correlation coefficients can be tested by
Correct : D. χ2-test
30. The successive trials are with replacement in
Correct : B. Binomial distribution
31. Probability of occurrence of an event lies between
Correct : C. 1 and 0
32. A discrete probability distribution may be represented by
Correct : D. All of These
33. Student’s t-distribution curve is symmetrical about mean, it means that
Correct : A. Odd Order Moments are Zero
34. Which one is equal to explained variation divided by total variation?