Question

In testing the differences between proportions, it is appropriate to use the Z test when

		np >= 5 and n(1-p) >= 5 for both samples
		n1 = n2.
		n1+n2 > 30.
		p*(1-p) >= 5 for both samples.

Answer 1

the conditions which are necessarily required to fulfill in order to use z-test for testing the differences between proportions is

np >= 5

and

n(1-p) >= 5 for both samples

Option A