January 2017
Beginner
882 pages
203h 41m
English
21. Independent. It is unlikely that seeing a Honda, for example, would make us suspect that the next car was also a Honda.
23. Dependent. The number of visits today is probably influenced by the same factors that influenced the number of visits yesterday.
25. Most likely independent
27. Independent. If A happens, then the chance for B remains one-quarter because B is one-quarter of the area of A.
Classify everyone as a drug user.
The problem is that the test will not be very specific.
31. No. The statement of the question first gives P(F|Y) = 0.45 and then P(Y|F) = 0.45. In order to be independent, P(F|Y) = P(F), but we are not given P(F).
0.42 = P(working affected grades|have loan). The sample space might be the collection ...