Suppose someone reports that 75% of college students go home for the summer and you believe it's higher than that. To use the Z distribution in your calculations you need to check the necessary condition(s). What condition(s) do you need to check? Group of answer choices npo and n(1-po) at least 10 n > 30 np and n(1-p) at least 10 nphat and n(1-phat) at least 10