3. Biostatistics

Probability Concepts — Quiz

Test your understanding of probability concepts with 5 practice questions.

Practice Questions

Question 1

Which of the following distributions is typically used to model the probability of a specific number of successes in a fixed number of independent Bernoulli trials, such as the number of people who recover from a disease in a clinical trial?

Question 2

In a public health study, the odds ratio is often used to compare the odds of an outcome occurring in one group versus another. If the odds of developing a disease are 3 times higher in an exposed group compared to an unexposed group, what is the odds ratio?

Question 3

A public health researcher is calculating the sensitivity of a diagnostic test for a disease. If the test correctly identifies 90 out of 100 individuals who truly have the disease, what is the sensitivity of the test?

Question 4

What is the specificity of a diagnostic test if it correctly identifies 95 out of 100 individuals who do not have the disease?

Question 5

In a public health context, what does the p-value represent in hypothesis testing?