1. According to recent reports, 30% of Americans are now classified as obese. A sample of 800 Americans found that 278 of them were obese. According to the sample the odds a person is obese is
A. 0.429.
B. 0.533.
C. 2.333.
2. According to a recent survey, 275 of 400 middle-aged Americans said they used the Internet regularly. 140 of 400 senior citizens said they used the Internet regularly. The odds ratio for a middle-aged American to use the Internet regularly is
A. 2.20.
B. 0.54.
C. 0.6875.
3. According to a recent survey, 275 of 400 middle-aged Americans said they used the Internet regularly. 140 of 400 senior citizens said they used the Internet regularly. The log odds ratio for a senior citizen to use the Internet regularly is
A. 0.788.
B. -0.619.
C. -1.050.