Discussion
The most appropriate statistical test for analysing qualitative data is
(i) Pearson's r
(ii) Sign test
(iii) Kruskal-Wallis test
(iv) F-test
Answer: D
The most appropriate tests for analysing qualitative data are the sign test and the Kruskal-Wallis test, which are (ii) and (iii), option D. These are non-parametric tests, which work on data at the nominal or ordinal level, without the assumption of a normal distribution. Pearson's r and the F-test are parametric methods for quantitative data measured on an interval scale, so options A, B and C, which include (i) or (iv), are wrong.
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