First Example Exam Solution

# First Example Exam Solution - IMSE 213 Prob and Stat First...

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IMSE 213: Prob and Stat First Exam Name: ____________________ Practice First Exam for IENG 213 (c) 2002 Steven Guffey, PhD page 1 9/29/2007 You may use your text and any "cheat sheets" you created. You may not use your HW papers or the statistical functions on a calculator You may not share texts, cheat sheets, or calculators. 97 Show your work, especially equations used, limits for summations and intergrations, etc. Pts. No. Problem statement Comment: This is based on one of my first tests. 1 What is the probability of drawing 3 aces in a row from a deck of 52 if you: 2 a) Replace the card drawn and re-shuffle the deck each time = (4/52)^3 comment: too easy 2 b) Discard each card as it is drawn and re-shuffle the rest of the deck before drawing again =(4/52)(3/51)(2/50) 1 2 A card is drawn from a ordinary 52-card deck. What is the probability that it is a 3, given that it is a face card? ________ = 0 comment: too easy 3 3 Given the following data, compute the median: Data: -4 1 2 5 comment: too easy Median: ___________ 1.500 =(two middle)/2 4 What is the mean and the standard deviation of the data above? 2 Mean: ___________ 1.000 comment: too easy 3 Std. Dev.: ___________ 3.742 5 Given that P(A) = 0.6 and P(B) = 0.2 and A and B are independent. 3 a) P(A U B) 0 680 P(A U B) = ______ 0.680 3 b) P(A B) = ______ 0.120 comment: should be word problem 6 6 Three computer brands are each sold with 5 different RAM configurations and 2 different harddisk sizes. How many choices do I have?

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