Online Quiz 5

# Online Quiz 5 - Maple T.A. - Gradebook

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System Homepage » Class Homepage » Student Details » Student Assignment Details Stat 230 W09 : Gradebook Welcome Po-Wei Chuang [ My Profile ] Assignment detail for Po-Wei Chuang in Online Quiz 5: Po-Wei Chuang Login: pchuang Email: [email protected] Student ID: 20260696 Assignments completed: 22 Assignments active: 0 Question Grade 1 Shown here is a table for a probability distribution for r.v. X and Y. X 3 6 8 Y -1 0.04 0.03 0.03 0 0.08 0.06 0.06 1 0.28 0.21 0.21 Find P(X = 8 | Y = 0) Your Answer: 0.3 Correct Answer: 0.3±2E-4 Comment: Use the conditional probability formula: Note that P(B) is just the marginal probability - just add up all the probabilities for which Y = 2. The top of the expression is just read from the table as the entry where X = 3 and Y = 2. Instructors Comment: 1.0 2 Your response Correct response A coin is (unfairly) weighted so that the probability of a toss coming up Heads is . Toss this coin twice. Define two r.v. as follows: X is the number of Heads. Y is the number of Heads in the first toss (that is 0 or 1). Complete the probability table: X = # heads 0 1 2 Y 0 1/9 a 0 1 0 b c by selecting which choice is a,b,c : (0%) A coin is (unfairly) weighted so that the probability of a toss coming up Heads is . Toss this coin twice. Define two r.v. as follows: X is the number of Heads. Y is the number of Heads in the first toss (that is 0 or 1). Complete the probability table: X = # heads 0 1 2 Y 0 1/9 a 0 1 0 b c by selecting which choice is a,b,c : Total grade: 0.0 × 1/1 = 0% Instructors Comment: 0.0 Gradebook Help Logout Maple T.A. - Gradebook http://maple-ta4.math.uwaterloo.ca:8080/mapleta/gradebook/gr. .. 1 of 4 4/6/09 8:59 AM

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Question Grade 3 Your response Correct response Three manufacturers Apatosaurex, Becklespinax, and Coelophysis share a market for a product. Their market shares are 35%, 45% and 20% respectively. Testing has shown that the defective rate of production for the
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## This note was uploaded on 03/24/2010 for the course STAT 230 taught by Professor Various during the Winter '06 term at Waterloo.

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Online Quiz 5 - Maple T.A. - Gradebook

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