6. You are conducting a survey by mail among Jamaica residents on their knowledge in cardiovascular diseases. You provided an incentive of $20 for completing the survey. You are likely to get a high response rate with unbiased survey results using this approach.

1. True
2. False

7. When analyzing direct medical cost data, which of the following are correct?

1. Based on different perspectives, costs can vary greatly
2. Should take post-surgery bodily pain into account
3. Should pay particular attention to outlier values
4. Should adjust for price change over years a. 1, 2, 3; b. 2, 3, 4; c.1, 3, 4 ; d. 1, 2, 4 ; e. 1, 2, 3, 4

8. In a study comparing treatment outcomes between patients who received Medication Therapy Management (MTM) and those who did not, the costs per patient for the first group was $450 and for patient without MTM, was $350. The difference of costs per patient ($100), is an example of

1. Incremental cost
2. Marginal cost

9. Generally, statisticians can take a mean (average) value from a group when there is a number of outlier observations

1. True
2. False

10. Which of the following is the most important reason why in general a prospective cohort study provides stronger evidence regarding the association between exposure and disease than a cross-sectional study?

1. A prospective cohort study usually has larger sample size, while a cross-sectional study often have smaller sample sizes
2. A prospective cohort study studies a sequential relationship between exposure and outcomes, while a cross-sectional study does not
3. A prospective cohort study is much less likely to be affected by confounding than a cross-sectional study, because of the methods they used to collect data are different
4. A prospective cohort study is much less likely to have measurement errors than a cross-sectional study