A cartoon that can be helpful in introducing scree plots and their interpretation in an exploratory principal components analysis to determine the number of factors to be used. The cartoon is arendition of Edvard Munch’s famous painting “The Scream”. The cartoon was used in the January 2019 CAUSE cartoon caption contest and the winning caption was submitted by Larry Lesser from The University of Texas at El Paso. An alternative caption: "The feeling you get when the p-value is 0.055," was submitted by Minu Bhunia, a student at University of Minnesota, and can be used in discussing the interpretation of p-values and the arbitrary nature of the 0.05 cutoff.The cartoon was drawn by British cartoonist John Landers (www.landers.co.uk) based on an idea by Dennis Pearl from Penn State University.
- Prof Dev