An online retailer would like to know whether the proportion of customers who visit the site and make a purchase is different than 50%. A simple random sample of customers is taken. The results of the sample are shown below. Customer sample What is the population parameter? made a purchase 45 Observations 120 The proportion of all customers who made a purchase on the site Confidence Level 99% Critical value -2.58 What condition for using a z-distribution is met? test statistic (z) -2.74 p-value 0.006 A simple random sample of more than 30 customers was taken. v What is the level of significance? .01 What is the null hypothesis Ho? p = 0.50 v What is the alternative hypothesis H, ? p # 0.50 ~ Should Ho be rejected or does Ho fail to be rejected? Reject Ho V What conclusion can be drawn from the data? Sufficient evidence exists to support the claim that the number of customers who visit the site and make a purchase is not 50%