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Quiz2 Fa 05 key

# Quiz2 Fa 05 key - ECON 2843 Quiz 2 Fall 2005 Name ID KEY...

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ECON 2843 Name KEY Quiz 2 Fall 2005 ID # Students must show all work on problems that involve calculation. Questions 1 - 3 refer to the following table, which gives the joint probability distribution for workers and shifts at Flex Furniture Company. The company has decided to conduct random drug testing. Shift 1 2 3 Total Worker Male .10 .26 .51 Female .19 Total .40 .15 1. If a shift 1 worker is selected, what is the probability that the worker will be a male? a. 0 b. .10 c. .1961 d. .25 * e. .35 2. If a worker is randomly selected, what is the probability that the worker will be a both a female and work on shift 1? 3. Show whether the events “female” and “working on shift 3” are mutually exclusive? Yes, the P(intersection) = 0 1

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Questions 4 – 7 refer to the following. Twenty percent of the students at the University of Oklahoma travel to at least one foreign country during the summer break. Of those students who do not travel to a foreign country over the summer, 37.5% will enroll in at least one summer course.
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