Exercise

Does Subsetting Change Things?

In the last exercise, you looked at the PCA analysis of just the wide receivers in the NFL combine data. The summaries of the PCA analysis for the whole combine dataset and the wide receiver subset are loaded as pca_summary and pca_summary_wr, respectively.

What is true about this data in relation to the dataset as a whole?

Instructions

50 XP

Possible Answers

With less data, the first PC of the subset data explains more of the variability in the dataset.
The first PC explains similar amounts of variability for both datasets.
It takes the first 3 PCs of the subset data to explain the same amount of variability as the first PC of the whole dataset.

Take Hint (-15 XP)