A pharmaceutical company has formulated a new medicine for relieving migraine headaches. The company wants to test the hypothesis that the drug is effective at least 73% of the time. A clinical study...

A pharmaceutical company has formulated a new medicine for relieving migraine headaches. The company wants to test the hypothesis that the drug is effective at least 73% of the time. A clinical study of 111 out of 143 adults suffering from migraine headaches reported relief after using the drug. Is this sufficient evidence that the drug is effective at least 73% of the time? Use a 5% significance level