Question 5(4.2 polnts) d It has been reported that 48% of airline passengers bel

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Question 5(4.2 polnts) d It has been reported that 48% of airline passengers believe that t i not necessary to turn off electronics during take off and landing. A random sample of 60 alrline passengers is drawn. Find the probablity that the proportion of alrlne passengers In the sample who beleve that It ls not necessary to turn off electronlcs Is less than 0.496 Write only a number as your answer. Round to 4 declmal places (for example 0.3748) Do not write as a percentage Your Answer: Answer Save Questlon 6 (4.2 points) In a simple random sample of 36 electronic components produced by a certaln method, the mean lifetlme was 822 hours. Assume that component lifetlmes are normally distributed with population standard deviation 74 hours. What is the upper bound of the 95% confidence Interval for the mean lifetime of the components? Round your answer to the nearest Integer. Write only a number as your answer. Your Answer: Answer

Explanation / Answer

5)
Z = (p^ - p)/sqrt(pq/n) = (p^ - 0.48)/sqrt(0.48*0.52/60)

we need to find

P(p^ < 0.496)
= P(Z > ( (0.496- 0.48)/sqrt(0.48*0.52/60))
=P(Z > 0.24806946917)
= 0.402

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