The practice of"phishing," or using the Internet to pilfer personalinformation, has become an increasing concern. Suppose a credit union instituted an extensive online security and education program in an effort to combat phishing. The creditunion's managers believe that if more than 9% of their customers have cut back on their Internet banking transactions because of fears aboutphishing, they will be required to take more stringent action to lower this percentage. The creditunion's information technology department analyzed 160 randomly selected accounts and determined that 19 had cut back on their Internet banking transactions.

a. State the appropriate null and alternative hypotheses for this situation.

b. Using =0.01 and thep-value approach, indicate whether the sample data support taking more stringent action.

a. Identify the null and alternative hypotheses for this test. Let p be the population proportion of accounts that have cut back on their Internet banking transactions at this credit union.

A.

H0: p0.09

HA: p<0.09

B.

H0: p>0.09

HA: p0.09

C.

H0: p0.09

HA: p>0.09

D.

H0: p=0.09

HA: p