1. A drug manufacturer sells a drug which they claim will induce sleep for at least 80% of people suffering from insomnia. A drug regulator believes this percentage is too high. To determine if they have evidence to contradict the drug manufacturer, the drug regulator administers the dosage to a random sample of 120 insomniacs and find that 75% had sleep induced by the drug. Perform an appropriate hypothesis test. Use a significance level of 0.05