January 2017
Beginner
882 pages
203h 41m
English
11. False. These 25 make up a small portion of the total number of transactions
13. False. The chance that the first three are OK is (999/1000)3. Hence, the chance for an error is 1 − (999/1000)3 ≈ 0.003.
15. False. This clustering would likely introduce dependence.
17. False. A Poisson model requires independent events, not clusters.
19. True
21. False. The rate λ = 0.24. The chance for no defect is 0.787 and the chance for at least one defect is 0.213.