**MCQS Hypothesis Testing 2**

**MCQS Hypothesis Testing 2**

Multiple Choice Questions from Statistical Inference for the preparation of exam and different statistical job tests in Government/ Semi-Government or Private Organization sectors. These tests are also helpful in getting admission in different colleges and Universities.

Most of the MCQs on this page are covered from Estimate and Estimation, Testing of Hypothesis, Parametric and Non-Parametric tests etc.

**Question 1:** The sign test is

A) Less Powerful than that of the Wilcoxon signed rank test

B) More Powerful than the paired sample t-test

C) More Powerful than the Wilcoxon signed rank test

D) Equivalent to Mann-Whitney test

**Question 2:** The non parametric equivalent of an unpaired samples t-test is

A) Sign test

B) Wilcoxon signed rank test

C) Mann-Whitney U test

D) Kruskal Wallis Test

**Question 3:** The Mann-Whitney U test is preferred to a t-test when

A) Data are paired

B) Sample sizes are small

C) The assumption of normality is not met

D) Sample are dependent

**Question 4:** When using the sign test, if two scores are tied, then

A) we count them

B) we discard them

C) we depends upon the scores

D) None of these

**Question 5:** The sign test assumes that the

A) Samples are independent

B) Samples are dependent

C) Samples have the same mean

D) None of these

**Question 6:** When testing for randomness, we can use

A) Mann-Whitney U test

B) Sign test

C) Runs test

D) None of these

**Question 7:** 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) Either of the above

D) None of the above

**Question 8:** Wilcoxon Rank-Sum test can be of

A) Upper tailed

B) Lower tailed

C) Either of the above

D) None of the above

**Question 9:** The Wilcoxon Rank-Sum test used to compares

A) Two populations

B) Three Populations

C) A sample mean to the population mean

D) Any number of populations

**Question 10:** The Wilcoxon Signed Rank test is used

A) Only with independent samples

B) Only in matched pairs samples (dependent samples)

C) As an alternative to the Kruskal-Wallis test

D) To test for randomness

**Question 11:** Which of the following test use Rank Sums

A) F test

B) Chi-Square and Sign tests

C) Runs test

D) Kruskal-Wallis and Wilcoxon tests

**Question 12:** Which of the following test must be two-sided?

A) Kruskal-Wallis

B) Wilcoxon Signed Rank

C) Runs test

D) Sign test

**Question 13:** 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 the above

D) None of the above

**Question 14:** 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 the two samples may affect the decision

**Question 15: **The Spearman Rank-Correlation test requires that the

A) Data must be measured on the same scale

B) Data should be of ordinal scale at least

C) Data must be from two independent samples

D) Data must be distributed at least approximately as a t-distribution

**Question 16:** To perform a Runs test for randomness the data must be

A) Qualitative

B) Quantitative

C) Divided into at least two classifications

D) Divided into exactly two classification

**Question 17:** Three brands of coffee are rated for taste on a scale of 1 to 10. Six persons are asked to rate each brand so that there is a total of 18 observations. The appropriate test to determine if three brand taste equally good is

A) One way analysis of variance (ANOVA)

B) Wilcoxon Rank-Sum test

C) Spearman Rank difference

D) Kruskal-Wallis test

**Question 18:** Comparing the times-to-failur of radar transponders made by firms A, B, and C based on an airline’s sample experience with the three types of instruments one may use

A) Kolmogorov-Smirnov test

B) Kruskal-Wallis test

C) Wilcoxon Rank-Sum test

D) Spearman Rank Correlation test

**Question 19:** Which of the following tests is most likely assessing this null hypothesis: H0 The number of violations per apartment in the population of all city apartments is binomially distributed with a probability of success in any one trial of P=0.3

A) The Kolmogorove-Simirnov test

B) The Kruskal-Wallis test

C) The Mann-Whitney test

D) The Wilcoxon Signed Rank test

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