Experimental Design

Here is the video version of Lesson 27 from Stat Trek's free online tutorial covering the complete curriculum for Advanced Placement (AP) Statistics.

About This Video

This video lesson describes experimental design, a plan for assigning experimental units to treatment conditions. The video explains how a good experimental design serves three purposes: (1) allows the experimenter to make causal inferences about the relationship between independent variables and a dependent variable, (2) allows the experimenter to rule out alternative explanations due to confounding, and (3) reduces variability within treatment conditions. And finally, the video describes three experimental designs - a completely randomized design, a randomized block design, and a matched pairs design.

A written version of the material covered in this video is available at https://stattrek.com/experiments/experimental-design.

About Stat Trek's Video Series

A little history: About two decades ago, Stat Trek produced a free online tutorial covering the complete curriculum for AP Statistics. The tutorial, which can be found at https://stattrek.com/tutorials/ap-statistics-tutorial, was to designed to help students prepare for and pass the AP Statistics exam. Consisting of 69 easy-to-understand written lessons, the tutorial was very well-received.

Of course, there is always room for improvement. With that in mind, some students suggested supplementing the written lessons with video instruction. The Stat Trek video series is our response to that suggestion. So far, we've produced 45 video lessons, one video lesson for each of the first 45 written lessons from Stat Trek's' AP Statistics Tutorial.

The work continues. We're adding videos little by little. Eventually, we intend to have a video for each of the 69 written lessons from the tutorial.