The nonparametric tests like the Sign test,the Wilcoxon rank sum test,the Mann-Whitney test,and the Wilcoxon signed rank test require that the probability distributions be:
A)identical except with respect to location.
B)identical except with respect to spread (variance).
C)identical except with respect to shape (distribution).
D)different with respect to location,spread,and shape.

Question

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The nonparametric tests mentioned above require that the probability distributions be identical except with respect to location. This means that the shapes and spreads of the distributions can differ, but the center point must be the same. These tests are used to compare the medians of two or more groups, and they do not assume normality or equal variances, making them robust to violations of these assumptions.

The Nonparametric Tests Like the Sign Test,the Wilcoxon Rank Sum