In reply to Thomas Cox.

(I realized that I didn't do the chi-square correctly yesterday... it was below 0.2 but still out of the range of a significant difference. I don't remember the exact value when I redid it this morning).

But... something interesting did happen. I had a few more students today who were absent yesterday... further reducing the margin of error, with green still coming out ahead... and now the 99% CI for green begins right at .198! All of the other colors are still much closer to the CLV proportions from 2017... but now the chi-square p-value is just slightly above .05!

This also provoked an interesting classroom discussion about current controversies such as p-hacking.