If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

demographics

12 videos
9B: There are many different ways of looking at a population. You can separate the population into different groups to view statistics. For instance, one may want to compare the efficacy of a drug in treating diabetics with congestive heart failure compared to diabetics without heart failure - these each form two separate populations of patients. In this module, you will come to see how different populations interact and change over time.