test2_s02

# test2_s02 - Second Exam - Spring 2002 - ST 370 Online - A...

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Second Exam - Spring 2002 - ST 370 Online - A Darken the circle on the answer sheet corresponding to your answer. Use a number 2 pencil. Stray marks on the form may cause errors. All questions are worth 5 points. 1. The sample space of a random experiment is A. A list of all possible outcomes. B. The intersection of the largest two events. C. A sample of possible outcomes. D. All of the above. E. None of the above. 2. A system has the following ﬁve independent components with reliabilities written within the component boxes. Find the reliability of the system (to three signiﬁcant digits). |------| |------| |--|R1=.8 |--| |--|R4=.9 |--| | |------| | |------| | |------| | ----| |---|R3=.95|----| |---- | |------| | |------| | |------| | |--|R2=.8 |--| |--|R5=.9 |--| |------| | |------| | A. 0.492 B. 0.684 C. 0.903 D. 0.845 E. None of the above. 3. As customers make appointments at a dentist’s oﬃce, they are randomly assigned to either Dentist A ,Dent ist B ,orDent C with probabilities .50, .40, and .10, respectively. If Dentist A is chosen, then Dental Hygienist 1 is assigned with probability .75 and Dental Hygienist 2 is assigned with probability .25. If Dentist B or C is chosen, then Dental Hygienist 1 is assigned with probability .25 and Dental Hygienist 2 is assigned with probability .75. What is the probability that a random customer will end up with Dentist B and Dental Hygienist 2? A. 0.30 B. 0.375 C. 0.025 D. 0.10 E. None of the above. 1

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A group of court cases in which the truth of guilt or innocence could later be determined to a high probability were categorized as follows:
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## This note was uploaded on 01/16/2012 for the course ST 370 taught by Professor Nail during the Spring '08 term at N.C. State.

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test2_s02 - Second Exam - Spring 2002 - ST 370 Online - A...

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