Question: The paired sign test can be used whether or not the paired difference variable has a symmetric distribution. a. If the distribution is in fact

The paired sign test can be used whether or not the paired difference variable has a symmetric distribution.
a. If the distribution is in fact symmetric, the paired Wilcoxon signed-rank test is preferable. Why do you think that is so?
b. What advantage does the paired sign test have over the paired Wilcoxon signed-rank test?

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