Which of the following conditions necessitates using a non-parametric test over a parametric test?
A. The sample size is very large.
B. The population variance is known.
C. The data is ordinal.
D. The data is symmetrical.
Choose the correct answer from the options given below:
1
C only
2
A, B, and C only
3
A, C, and D only
4
C and D only