McNemar's test should be used when:
a. We have more than two variables.
b. We have a nominal dichotomous independent variable and a severely skewed dependent variable that is at the ordinal, interval or ratio level of measurement.
c. We want to examine change from pretest to posttest within one group on a nominal variable.
d. We want to compare sample proportions on a single variable to proportions known to exist in the broader population.
C
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