Statistics: Parameters, Variables, Intervals, Proportions (Quickstudy: Academic)

Reader's review:
It provides a lot of important Statistics information. So far, I am in Week 4 of an 8 week Psychology Statistics course and have not needed it, though it was recommended for the class; but I would refer to it if I do encounter a problem. It arrived in a timely fashion, new condition, and is easy to read. Thank you for a helpful product.