If there are three or more populations, then it is
a. possible to test for equality of three or more population proportions.
b. impossible to test for equality of the three population proportions, because chi-square tests deal with only two populations.
c. customary to use a t distribution to test for equality of the three population proportions.
d. reasonable to test for equality of multiple population proportions using chi-square lower tail tests.
a
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