Week 3

Question 1

What are independent variable?

Answer 1

the variable which we are manipulating or that is controlled.

Question 2

What are dependent variable?

Answer 2

the variable along which we are examining for differences. The observed variable.

Question 3

What are the three types of relationships in statistics?

Answer 3

linear, curvilinear, and no relationship

Question 4

What two components do you look for in a correlation?

Answer 4

strength relationship and direction of relationship

Question 5

What is prospective cohort study?

Answer 5

It is the study where some people are exposed while other aren’t, and a follow up on the disease and the development.

limitations: costly, and takes time

Question 6

What is case control study?

Answer 6

It is the study were there they examine relation of an exposure to a disease, and they also identify people with the disease match to people without the diseases and compare with respect to prior exposure status.

limitation: recall bias, cannot estimate disease incidence or prevalence. WHY?

Question 7

What is cross sectional study?

Answer 7

A survey of a population where the exposure and disease status are determined at the same time

limitation:
- lack of temporal or cause ordering