Câu hỏi: Which of the following statements is correct concerning the conditions required for OLS to be a usable estimation technique?
A. The model must be linear in the parameters
B. The model must be linear in the variables
C. The model must be linear in the variables and the parameters
D. The model must be linear in the residuals
Câu 1: What is the relationship, if any, between the normal and t-distributions?
A. A t-distribution with zero degrees of freedom is a normal
B. A t-distribution with one degree of freedom is a normal
C. A t-distribution with infinite degrees of freedom is a normal
D. There is no relationship between the two distributions
30/08/2021 9 Lượt xem
Câu 2: Which of the following is NOT a good reason for including lagged variables in a regression?
A. Slow response of the dependent variable to changes in the independent variables
B. Over-reactions of the dependent variables
C. The dependent variable is a centred moving average of the past 4 values of the series
D. The residuals of the model appear to be non-normal
30/08/2021 8 Lượt xem
Câu 3: Consider an increase in the size of the test used to examine a hypothesis from 5% to 10%. Which one of the following would be an implication?
A. The probability of a Type I error is increased
B. The probability of a Type II error is increased
C. The rejection criterion has become more strict
D. The null hypothesis will be rejected less often
30/08/2021 7 Lượt xem
Câu 4: Which of the following would NOT be a potential remedy for the problem of multicollinearity between regressors?
A. Removing one of the explanatory variables
B. Transforming the data into logarithms
C. Transforming two of the explanatory variables into ratios
D. Collecting higher frequency data on all of the variables
30/08/2021 9 Lượt xem
Câu 5: The type I error associated with testing a hypothesis is equal to:
A. One minus the type II error
B. The confidence level
C. The size of the test
D. The size of the sample
30/08/2021 8 Lượt xem
Câu 6: Suppose that we wanted to sum the 2007 returns on ten shares to calculate the return on a portfolio over that year. What method of calculating the individual stock returns would enable us to do this?
A. Simple
B. Continuously compounded
C. Neither approach would allow us to do this validly
D. Either approach could be used and they would both give the same portfolio return
30/08/2021 9 Lượt xem
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