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.
Deze oefening maakt deel uit van de cursus
Experimental Design in R
Oefeninstructies
- Load the
dplyrpackage. - Use
count()to determine how many guinea pigs were given each supplement and dose.
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
# Load dplyr
___
# Count number of observations for each combination of supp and dose
___ %>%
___