When we make inferences regarding the difference of 2 independent population proportions, what assumptions do we require to make? Mark all that apply.
A. Random samples.
B. Normal distribution of response variable.
C. Sample size should be greater than or equal to 30.
D. Counts of successes as well as failures at least 15 each for each group.
E. The sum of counts of successes and failures must be greater than 30.