Site explains what one-tail and two-tail hypothesis testing are. Includes graphs to aid in understanding.

A page from the university's statistics site which builds on the standard errors from the Central Limit Theorem previously explained. Here hypothesis testing is defined and validated.

Look at the results of different experiments, and determine if they are statistically significant. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Learn what Type 1 and Types 2 errors are in statistics and how they differ. Includes examples demonstrating the differences.