The first sentence is "We are now ready for a crucial concept : the p - value." This seems to say that there are materials that precede this document.

Where can one find those materials?

Thanks for the recognition. Just so people understand the context for this notebook, I developed it as part of a class I teach to students at the University of Houston Law Center, Analytic Methods for Lawyers, so that they have a good conceptual understanding of statistics. I hope it is helpful for others.

Also, ignore the last paragraph of the notebook; it should not be there. (maybe the moderators could delete it).