9.39 Avian Flu Avian flu is clearly on the radar of Canadians. Given the amount of media coverage on the Avian Flu issue, it is not surprising to find that about 60% are concerned about it. However, the concern is fairly modest, only 19% being "very concerned," but this suggests that concern has the potential to grow as events unfold. The above result is based on a report to the Globe and Mail and CTV from The Strategic Coun- sel, 2005.13 Suppose a random sample of 90 people is selected in 2007. Of these people, 20 are very con- cerned and 50 are concerned about the issue.

a. Do the sample data provide sufficient evidence to indicate that the proportion of very concerned is dif- ferent from 19%? Use = 0.05.

b. Do the sample data provide sufficient evidence to indicate that the proportion of concerned is different from 60%? Use = 0.05. a

c. Is there any reason to conduct a one-tailed test for either part a or b? Explain.