An experimenter has prepared a drug-dose level that he claims will induce sleep for at least80% of people suffering from insomnia. After examining the dosage we feel that his claims regarding the effectiveness of his dosage are inflated. In an attempt to disprove his claim, we administer his prescribed dosage to60insomniacs and observe that44of them have had sleep induced by the drug dose. Is there enough evidence to refute his claim at the 5% level of significance?

Find the test statistic and rejection region. (Round your answers to two decimal places. If the test is one-tailed, enter NONE for the unused region.)

test statisticz=-1.29

rejection region

z>

z<