Question

# 14. The Wilcoxon Signed Rank test is used _________ (A) Only with independent samples (B) Only...

14. The Wilcoxon Signed Rank test is used _________
(A)
Only with independent samples
(B)
Only in matched pairs samples (dependent samples)
(C)
To test for randomness
(D)
As an alternative to the Kruskal-Wallis test

15. Which of the following test must be two-sided?
(A)
Wilcoxon Signed Rank
(B)
Kruskal-Wallis
(C)
Runs test
(D)
Sign test

16. In testing for the difference between two populations, it is possible to use _________
(A)
The Wilcoxon Rank-Sum test
(B)
The Sign test
(C)
Either of (A) or (B)
(D)
None of these

17. In a Wilcoxon Rank-Sum test _________
(A)
Ties never affect the decision
(B)
Ties always affect the decision
(C)
Ties within one sample may affect the decision
(D)
Ties between two samples may affect the decision

18. What symbol represents the test statistic for the Mann–Whitney test?
(A)
H
(B)
U
(C)
T
(D)
Z

19. Two types of errors associated with hypothesis testing are Type I and Type II. Type II error is committed when _________
(A)
We reject the null hypothesis whilst the alternative hypothesis is true
(B)
We reject a null hypothesis when it is true
(C)
We accept a null hypothesis when it is not true
(D)
None of these

20. By taking a level of significance of 5% it is the same as saying _______
4
(A)
We are 5% confident the results have not occurred by chance
(B)
We are 95% confident that the results have not occurred by chance
(C)
We are 95% confident that the results have occurred by chance
(D)
We are 90% confident that the results have occurred by chance

21. Parametric test, unlike the non-parametric tests, make certain assumptions about _________
(A)
The population size
(B)
The underlying distribution
(C)
The sample size
(D)
Random sample

22. The level of significance can be viewed as ___________ that an analyst will accept when making a decision.
(A)
the amount of confident
(B)
the amount of risk
(C)
the acceptance rejoin
(D)
the rejection rejoin

23. One or two tail test will determine _________
(A)
If the two extreme values (min or max) of the sample need to be rejected
(B)
If the hypothesis has one or possible two conclusions
(C)
If the region of rejection is located in one or two tails of the distribution
(D)
None of these

24. Which of the following is not true of parametric statistics?
(A)
They are inferential tests
(B)
They assume certain characteristics of population parameters
(C)
They assume normality of the population
(D)
They are distribution-free

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