Which of the following tests employs matched-pairs sampling?

Which of the following tests employs matched-pairs sampling?
 a. the Wilcoxon signed-rank test
  b. the Wilcoxon rank-sum test
  c. the Mann-Whitney test
  d. the chi-square test
  e. none of these

Q. 2

The Wilcoxon signed-rank sum test involves:
 a. calculating the difference between the sample data for each matched pair. (Pairs with zero differences are eliminated from the test at this stage, and sample size, n, is reduced to the remaining number of pairs with nonzero differences)
  b. ranking the absolute values of the (nonzero) differences from the smallest (rank= 1 ) to the largest (rank = n)
  c. attaching to each rank the sign of the original difference corresponding to it, calculating the sum of these signed ranks, and designating it as the test statistic, T
  d. all of these
  e. none of these

Q. 3

A paired sample, two-sample t-test, corresponds to:
 a. a Wilcoxon signed rank test for paired samples
  b. a Wilcoxon rank sum test
  c. a Wilcoxon signed rank test for one sample
  d. a Friedman test for randomized block design
  e. none of these

Q. 4

The Wilcoxon Signed-Rank test may be more appropriate than the paired-difference t-test if:
 a. the population of differences is not normal
  b. the population of differences is normal
  c. the sample size is small
  d. the data values are quantitative
  e. the sample size is small and the data values are quantitative

Q. 5

In the Wilcoxon Signed-Rank test, if two or more measurements have the same nonzero difference, signs ignored, then:
 a. the scores are eliminated from the analysis
  b. the scores are assigned the lowest rank of the tied values
  c. the scores are assigned the highest rank of the tied values
  d. the average of the ranks of the tied values is assigned
  e. none of these

Q. 6

The Wilcoxon Signed-Rank test:
 a. makes use of the sign and the magnitude of the rank of the differences between pairs of measurements
  b. is concerned with the analysis of a single population
  c. cannot cope with ordinal data
  d. makes use of the sign but does not consider the magnitude of the differences between pairs of measurements.
  e. cannot cope with ordinal data and makes use of the sign but does not consider the magnitude of the differences between pairs of measurements

Q. 7

Which of the following tests employs matched-pairs sampling?
 a. The Wilcoxon signed-rank test.
  b. The Wilcoxon rank-sum test.
  c. The Mann-Whitney test.
  d. The Friedman test.
  e. The chi-square test.

Q. 8

The z-test approximation to the Wilcoxon signed rank sum test is used whenever the number of non-zeros differences is at least 50.
  Indicate whether the statement is true or false