If the usual assumptions behind parametric tests are met (at least approximately),
a. distribution-free tests are more powerful than parametric tests.
b. distribution-free tests are somewhat less powerful than parametric tests.
c. the tests are indistinguishable.
d. you shouldn't use a parametric test.
Question 2
A distribution-free test
a. is almost synonymous with a nonparametric test.
b. is a test that makes few assumptions about the distribution from which the data were drawn.
c. usually has less power than a parametric test.
d. all of the above
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