A Department of Transportation survey showed that 60% of U.S. residents over 65 years of age oppose
Question:
A Department of Transportation survey showed that 60% of U.S. residents over 65 years of age oppose use of cell phones in flight even if there were no issues with the phones interfering with aircraft communications systems. If this information is correct and if a researcher randomly selects 25 U.S. residents who are over 65 years of age,
a. What is the probability that exactly 12 oppose the use of cell phones in flight?
b. What is the probability that more than 17 oppose the use of cell phones in flight?
c. What is the probability that less than eight oppose the use of cell phones in flight? If the researcher actually got less than eight, what might she conclude about the Department of Transportation survey?
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n 25 p 60 a P x 12 n 25 and p 60 from Table A2 076 b P x 17 n 25 and p 60 from Table A2 x Prob 18 ...View the full answer
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