Which of the following tests can be applied to ordinal scale data?
1. Chi-square test
2. 'Z' test
3. Kruskal-Wallis test
4. Wilcoxon Mann-Whitney test
A. 1, 2 and 3
B. 2, 4 and 3
C. 1, 3 and 4
D. 1, 2 and 4
Answer: Option C

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