Millionaire Mode

Bias and Confounding in Epidemiological Studies

Question 1 of 15

Which of the following is an example of selection bias?

  1. Including only participants who have a certain disease in a study of the risk factors for that disease.
  2. Excluding participants who have a certain exposure from a study of the health effects of that exposure.
  3. Matching participants on age and sex in a study of the relationship between smoking and lung cancer.
  4. Randomly selecting participants from a population for a study of the prevalence of a disease.

Prize Money

15₹7 Crores
14₹1 Crore
13₹50,00,000
12₹25,00,000
11₹12,50,000
10₹6,40,000
9₹3,20,000
8₹1,60,000
7₹80,000
6₹40,000
5₹20,000
4₹10,000
3₹5,000
2₹2,000
1₹1,000