# Sample and population standard deviation

### Problem

3 problems ago: Not completed

2 problems ago: Not completed

Previous problem: Not completed

Get 3 correct in a row

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.

Main content
# Sample and population standard deviation

### Problem