1. A pharmaceutical firm has checked the cholesterol levels for each of 30 male patients, then provided them with fish-oil capsules to take on a daily basis. The cholesterol levels are rechecked after a 1-month period. Does this study involve independent samples or dependent samples?
2. Each of 20 consumers is provided with a pack- age containing two different brands of instant coffee.
A week later, they are asked to rate the taste of each cof- fee on a scale of 1 (poor taste) to 10 (excellent taste). Is this an example of independent samples or dependent samples?
3. A university president randomly selects 10 tenured faculty from the College of Arts and Sciences and 10 ten- ured faculty from the College of Business. Each faculty member is then asked to rate his or her job satisfaction on a scale of 1 (very dissatisfied) to 10 (very satisfied). Would this be an example of independent samples or dependent samples?