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| + | =[[MA375]]: [[MA_375_Spring_2009_Walther_Week_5| Solution to a homework problem from this week or last week's homework]]= | ||
| + | Spring 2009, Prof. Walther | ||
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6.1 #38 | 6.1 #38 | ||
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(1/2)*(1/4) = 0 False, DEPENDENT | (1/2)*(1/4) = 0 False, DEPENDENT | ||
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| + | [[MA375_%28WaltherSpring2009%29|Back to MA375, Spring 2009, Prof. Walther]] | ||
Latest revision as of 09:24, 20 May 2013
MA375: Solution to a homework problem from this week or last week's homework
Spring 2009, Prof. Walther
6.1 #38
Coin tossed 3 times. Possible Outcomes: TTT HHH TTH HHT THT HTH THH HTT
Are the following independent? ie. p(A intersection B) = p(A)* p(B)
a. First coin tails Second coin heads First coin tails and Second coin heads
4/8 4/8 2/8
(1/2)*(1/2) = 1/4 INDEPENDENT
b. First coin tails Two, and not three heads come up in a row Intersection: First coin tails, and then the last 2 are heads
4/8 2/8 1/8
(1/2)*(1/4) = 1/8 INDEPENDENT
c. Second coin tails Two, and not three heads come up in a row
4/8 2/8
Intersection: Second coin must be tails, and then the last 2 slots must be 2 heads in a row
0
(1/2)*(1/4) = 0 False, DEPENDENT
