(mrh ch05-322l) you want to test the proportion of defectives in samples from two suppliers. supplier a has sent you 330 samples, of which 41 are defective. supplier b has sent you 330 samples, of which 41 are defective. what is the value of your test statistic z0? enter your answer to four decimal places. if you calculate a negative number, just type the minus sign in front of it. do not take the absolute value of anything.
