vullly u: may. I An online retailer has a new website and would like to compare the proportion of customers who made a purchase from the old website versus the proportion who made a purchase from the new website to see if the two proportions are different. A simple random sample of customers visiting the old and new websites is taken. The results are shown below. Old site New site S uccesses 158 S uccesses 57 Observations 350 Observations 159 phat_1 0.451 p-hat_2 0.358 Condence Level 99% z-score 1.47 pvalue 0.142 Old site samples: 711 = EX: 9 z = EX: 1234 z = New site samples: 712 = Sample proportion for old site samples: 131 = Ex: 1234 Sample proportion for new site samples: 132 = |+| 2