问

问题如下：

A nonparametric test is most appropriate when the:

选项：

A.

data consist of ranked values.

B.

validity of the test depends on many assumptions.

C.

sample sizes are large but are drawn from a population that may be

non-normal.

解释：

A is correct. When the samples consist of ranked values, parametric tests are not

appropriate. In such cases, nonparametric tests are most appropriate.