Replication
Recall that replication means you need to conduct an experiment with an adequate number of subjects to achieve an acceptable statistical power. Sample size and power will be discussed in more detail later in this chapter.
Let's examine the ToothGrowth dataset to make sure they followed the principle of replication. We'll use dplyr to do some exploratory data analysis (EDA). The data has already been loaded for you.
This exercise is part of the course
Experimental Design in R
Exercise instructions
- Load the
dplyrpackage. - Use
count()to determine how many guinea pigs were given each supplement and dose.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Load dplyr
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# Count number of observations for each combination of supp and dose
___ %>%
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