Introduction
Essential Features of a Comparative Experiment
Experimental Design Principles
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Statistics in Data Analysis
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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
Figure 1
By eye it appears that there is a difference in mean heart rate between
exercise groups, and that increasing exercise intensity decreases mean
heart rate. We want to know if there is any statistically significant
difference between mean heart rates in the three exercise groups. The R
function anova() performs analysis of variance (ANOVA) to
answer this question. We provide anova() with a linear
model (lm()) stating that heart_rate depends
on exercise_group.
Figure 2
