Suppose we have two binomial populations where the true proportion of success is .2 for the first population and .3 for the second population. we take an srs of size 4 from the first population, and the number of successes is 3. we take an srs of size 400 from the second population, and the number of successes is 200. what is a possible reason that is not closer to .2?
a. all of the aboveb. because the sample size is too smallc. because of sampling variabilityd. because of nonresponse bias