The median test should be used to
a. Determine the likelihood that a sample’s median is actually different from “0.”
b. Determine the likelihood that two or more random samples have been taken from populations that have the same median.
c. Determine the likelihood that the observed frequency counts in a nominal-level variable for one group are different from another nominal-level variable.
d. Investigate the probability that the sample standard deviation does not accurately reflect a population standard deviation.