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.Management Sciences
Category: Statistical Inference Mcqs
The non parametric equivalent of an unpaired samples t-test____________?
A. Kruskal Wallis Test
B. Mann-Whitney U test
C. Wilcoxon signed rank test
D. Sign test
95% confidence limits u are ________________?
A. x±1.65 6/√n
B. u±1.95 S/√n
C. x±1.96 6/√n
D. ±1.96 6/√n
A test is said to be most powerful test of size α, if_______________?
A. Among all other test of size α or less it has the largest power
B. Among all other test of size α or greater it has the largest 1 – α
C. Among all other test of size α or greater it has the smallest power
D. Among all other test of size α or greater it has the largest β
In testing for the difference between two populations, it is possible to use____________?
A. The Wilcoxon Rank-Sum test
B. The Sign test
C. None of the above
D. Either of the above
The sign test assumes that the_______________?
A. Samples are independent
B. Samples have same mean
C. Sample are dependent
D. The Wilcoxon Signed Rank test is used
If we reject the null hypothesis, we might be making____________?
A. Unpredictable
B. A correct Decision
C. Type-II Error
D. Type-Error
If E(θˆ)=θ, then θˆ is said to be_______________?
A. Unbiased
B. Consistent
C. Sufficient
D. Efficient
The Runs test results in rejecting the null hypothesis of randomness when______________?
A. There is an unusually large number of runs
B. There is an unusually small number of runs
C. None of these
D. Either of the above
If n = 400 and P=.69 then 90% C.I for P is _________________?
A. 652 and . 728
B. .314 and .652
C. .798 and .745
D. None of these
For t distribution, increasing the sample size, the affect will be on ?
A. Standard Error of the Means
B. The t-ratio
C. Degrees of Freedom
D. All Above
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