An online retailer has a new website and would like to compare the proportion of customers who made a purchase 2 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 Successes 158 Successes 57 Observations 350 Observations 159 Proportion 0.451 Proportion 0.358 P = EX: 1.234 Confidence level 99% z-score 1.47 p-value 0.142 -3 -2 -1 0 2 3 Z = Ex: 1.234 Z = Old site samples: nold = Ex: 9 New site samples: nnew = Sample proportion for old site samples: P old = Ex: 1.234 Sample proportion for new site samples: P new =