MPH Epidemiology & Biostatistics

Question 1

What does 'incidence rate' measure in epidemiology?

Accepted Answer

The number of new cases in a population over a time period

Answer

Incidence rate measures new cases occurring in a defined population during a specified time period.

Question 2

Which study design is considered the gold standard for establishing causality?

Accepted Answer

Randomized controlled trial

Answer

Randomized controlled trials are considered the gold standard because randomization minimizes confounding and allows causal inference.

Question 3

A p-value of 0.03 means:

Accepted Answer

There is a 3% probability of observing results as extreme as these if the null hypothesis is true

Answer

A p-value represents the probability of observing results at least as extreme as those found, assuming the null hypothesis is true.

Question 4

What is a confidence interval used for in public health research?

Accepted Answer

To estimate the range within which the true population parameter likely falls

Answer

A confidence interval provides a range of plausible values for the true population parameter based on the sample data.

Question 5

Which measure of disease frequency is most appropriate for chronic diseases with long duration?

Accepted Answer

Prevalence

Answer

Prevalence captures all existing cases at a point in time, making it more useful for chronic conditions that persist over time.

MPH - Master of Public Health Practice Test