Math 227 - Statistics » Winter 2021 » Chapter 6 Test

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Question #1
According to the General Social Survey conducted at the University of Chicago, 59% of employed adults believe that if they lost their job, it would be easy to find another one with a similar salary. Suppose that 10 employed adults are randomly selected. Find the probability that exactly three of them believe it would be easy to find another job. Round your answer to 4 decimal places.
A.   0.0480
B.   0.4080
C.   0.1250
Question #2
According to the General Social Survey conducted at the University of Chicago, 59% of employed adults believe that if they lost their job, it would be easy to find another one with a similar salary. Suppose that 10 employed adults are randomly selected. Find the probability that more than two of them believe it would be easy to find another job. Round your answer to 4 decimal places.
A.   0.9485
B.   0.5894
C.   0.9854
Question #3
According to the General Social Survey conducted at the University of Chicago, 59% of employed adults believe that if they lost their job, it would be easy to find another one with a similar salary. Suppose that 10 employed adults are randomly selected. Would it be unusual if all of them believed it would be easy to find another job?
A.   usual
B.   !unusual
Question #4
In the game of craps, you may bet $1 that the next roll of the dice will be an 11. If the dice come up 11, your profit is $15. If the dice don't come up 11, you lose $1. The probability that the dice come up 11 is 1/18. What is the expected value of your profit? The expected value is
A.   $0.18
B.   $0.15
C.   -$0.11
Question #5
In the game of craps, you may bet $1 that the next roll of the dice will be an 11. If the dice come up 11, your profit is $15. If the dice don't come up 11, you lose $1. The probability that the dice come up 11 is 1/18. Is it an expected gain or an expected loss?
A.   gain
B.   loss

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