An experimenter has prepared a drug-dose level that he claims will induce sleep for at least 80% of people suffering from insomnia. After examining the dosage, we feel that his claims regarding the effectiveness of his dosage are too high. To disprove his claim, we administer his prescribed dosage to 50 insomniacs and observe that 37 of them have had sleep induced by the drug dose. Is there enough evidence to refute his claim at the 5% level of significance?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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TOPIC: Hypothesis Testing

please provide answers also for critical value and test statistics. Thank you

An experimenter has prepared a drug-dose level that he claims will induce sleep for at least 80% of people
suffering from insomnia. After examining the dosage, we feel that his claims regarding the effectiveness
of his dosage are too high. To disprove his claim, we administer his prescribed dosage to 50 insomniacs
and observe that 37 of them have had sleep induced by the drug dose. Is there enough evidence to refute
his claim at the 5% level of significance?
Transcribed Image Text:An experimenter has prepared a drug-dose level that he claims will induce sleep for at least 80% of people suffering from insomnia. After examining the dosage, we feel that his claims regarding the effectiveness of his dosage are too high. To disprove his claim, we administer his prescribed dosage to 50 insomniacs and observe that 37 of them have had sleep induced by the drug dose. Is there enough evidence to refute his claim at the 5% level of significance?
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