Creative Good, a New York consulting firm, claimed that 39% of shoppers fail in their attempts to purchase merchandise on-line because Web sites are too complex. They estimated that this would translate into a loss of more than $6 billion for on-line merchants during the 1999 holiday season (Forbes, Dec. 13,1999).

Another consulting firm asked a random sample of 60 on-line shoppers to each test a different randomly selected e-commerce Web site. Only 15 reported sufficient frustration with their sites to deter making a purchase.

a. Do these data provide sufficient evidence to reject the claim made by Creative Good? Test using a = .01.

b. Find the observed significance level of the test and interpret it in the context of the problem.