Câu hỏi: 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
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: Two researchers have identical models, data, coefficients and standard error estimates. They test the same hypothesis using a two-sided alternative, but researcher 1 uses a 5% size of test while researcher 2 uses a 10% test. Which one of the following statements is correct?
A. Researcher 2 will use a larger critical value from the t-tables
B. Researcher 2 will have a higher probability of type I error
C. Researcher 1 will be more likely to reject the null hypothesis
D. Both researchers will always reach the same conclusion
30/08/2021 8 Lượt xem
Câu 3: Which of the following is NOT correct with regard to the p-value attached to a test statistic?
A. p-values can only be used for two-sided tests
B. It is the marginal significance level where we would be indifferent between rejecting and not rejecting the null hypothesis
C. It is the exact significance level for the test
D. Given the p-value, we can make inferences without referring to statistical tables
30/08/2021 9 Lượt xem
Câu 4: The value of the Durbin Watson test statistic in a regression with 4 regressors (including the constant term) estimated on 100 observations is 3.6. What might we suggest from this?
A. The residuals are positively autocorrelated
B. The residuals are negatively autocorrelated
C. There is no autocorrelation in the residuals
D. The test statistic has fallen in the intermediate region
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: The numerical score assigned to the credit rating of a bond is best described as what type of number?
A. Continuous
B. Cardinal
C. Ordinal
D. Nominal
30/08/2021 10 Lượt xem

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