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Comprehensive Guide to Practice Exam #3 Answers for BE101

This document provides a detailed breakdown of the answers to Practice Exam #3 for BE101, scheduled for May 7 from 4:00 to 5:45 PM. Key components include a maximum expected finish (MAX EF) of 24 for part (a), identification of the critical path through nodes A-C-E-F, and calculations concerning variance and standard deviation of 5.2 and 2.28, respectively. Additionally, it covers Bayes' rule applications related to profit probability. Essential concepts like cumulative probability and shortest route analyses are also highlighted, offering a thorough resource for exam preparation.

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Comprehensive Guide to Practice Exam #3 Answers for BE101

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  1. Answers to Practice Exam #3 • Exam May 7 4:00-5:45PM since BE101 has 6:00PM class • C-4 due May 9 • Set 9 due May 9

  2. 1.PERT

  3. ANSWER T0 (a)=MAX EF=24

  4. ANSWER(b):A-C-E-F

  5. 1C: • CRITICAL PATH VARIANCE= SUM OF VARIANCES ON CP= VARIANCES OF A,C,E,F = 4+.6+.5+.1=5.2 =5.2 • STANDARD DEVIATION = SQUARE ROOT OF 5.2 = 2.28

  6. NORMAL TABLE • Z=(27-24)/2.28 = 1.32 • ROW 1.3 • COL 0.02 = .02 • CUMULATIVE PROB = .5 + .4066 = .9066 FROM TAYLOR, P 738

  7. 2. SHORTEST ROUTE

  8. A-C ADDED

  9. A-D ADDED

  10. D-E ADDED

  11. E-F ADDED

  12. EXAM FORMAT

  13. 3. BAYES RULE • P(PROFIT)=.52 • P(S|PROFIT)=.85 • P(S|NOT PROFIT) = .25 • S= SUCCESSFUL • P(UNPROFITABLE)=1-P(PROFIT)= 1-.52=.48

  14. P(PROFIT|S) • .85*.52 = .79 .85*.52+ .25*.48

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