Math 240

X zy Section 8.2 - MAT 240: Applied St x Course Hero x + .zybooks.com/zybook/SNHUMAT240Master1/chapter/8/section/2 library > MAT 240: Applied Statistics home > 2: Hypothesis test for the difference between two population proportions zyBooks catalog CHALLENGE ACTIVITY 8.2.4: Hypothesis testing for two population proportions (two-tailed z-test). Start 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 Successes 156 Successes 49 Observations 400 Observations 100 p-hat_1 0.39 p-hat_2 0.49 P = Ex: 1.234 Confidence Level 90% z-score 1.819 p-value 0.069 -3 -2 -1 3 Z = Ex: 1.234 Z= Old site samples: n1 = Ex: 9 New site samples: n2 = Sample proportion for old site samples: p1 = Ex: 1.234 Sample proportion for new site samples: p2 =