Introduction

Essential Features of a Comparative Experiment

Experimental Design Principles

Figure 1

International Prototype of the Kilogram

Figure 2

shelves of cages beneath a light

Statistics in Data Analysis

Figure 1

living histogram of female student heights

Figure 2

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Figure 6

null hypothesis

Figure 7

alternative hypothesis

Figure 8

Showing this plot is much more informative and easier to interpret than a long table of numbers. With this histogram we can approximate the number of individuals in any given interval. For example, there are approximately 29 individuals (~2.8%) with a resting heart rate greater than 90, and another 31 individuals (~3%) with a resting heart rate below 50.

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Figure 15

Code adapted from Power Curve in R by Cinni Patel.

Figure 16

Code adapted from How to Create Power Curves in ggplot by Levi Baguley

Completely Randomized Designs

Completely Randomized Design with More than One Treatment Factor

Randomized Complete Block Designs

Repeated Measures Designs