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# View of /trunk/NationalProblemLibrary/UVA-Stat/setStat212-Homework03/stat212-HW03-07.pg

Tue Jul 3 21:36:52 2007 UTC (5 years, 10 months ago) by jjholt
File size: 1221 byte(s)
Added stat problems.  Tags to be fixed soon.


    1 ## DESCRIPTION
2 ##  Statistics: Probability
3 ## ENDDESCRIPTION
4
5 ## KEYWORDS('statistics', 'probability')
6 ## naw tagged this problem.
7
8 ## DBchapter('Probability')
9 ## DBsection()
10 ## Date('6/7/2005')
11 ## Author('Jeff Holt')
12 ## Institution('UVA')
13 ## TitleText1('Statistics for Management and Economics')
14 ## EditionText1('6')
15 ## AuthorText1('Keller, Warrack')
16 ## Section1()
17 ## Problem1()
18
19
20 DOCUMENT();        # This should be the first executable line in the problem.
21
23 "PG.pl",
24 "PGbasicmacros.pl",
25 "PGchoicemacros.pl",
27 "PGnumericalmacros.pl",
28 "PGstatisticsmacros.pl",
29 "PGauxiliaryFunctions.pl"
30 );
31
32 TEXT(beginproblem());
33 $showPartialCorrectAnswers = 1; # Change to 0 to shut off separate answer display. 34 ## install_problem_grader(~~&std_problem_grader); # Uncomment to turn off partial credit. 35 36$a = random(.15,.35,.01);
37 $b = random(.59,.89,.01); 38$banda = random(.26,.44,.01);
39
40 BEGIN_TEXT
41 $PAR 42 Suppose that $$A$$ and $$B$$ are two events for which 43 $$P(A) = a$$, $$P(B) = b$$, and $$P(A\;\mathrm{and}\;B) = banda$$ Find 44 $$P(A|B)$$. 45$PAR
46 $$P(A|B) =$$ \{ans_rule(15)\}
47 $BR 48 49 50 END_TEXT 51 52 &ANS(num_cmp($banda/\$b));
53
54 ENDDOCUMENT();       # This should be the last executable line in the problem.