Links to Other Resources Mentioned in the Book
This website allows you to download and install, free of charge, the latest version of G*Power which is an accessible software package allowing you to conduct a range of sample size and power calculations. It also contains a very useful User Guide.
Z Scores Calculator
This website allows you to enter the mean and standard deviation for a distribution and will calculate for you what proportion of cases there are above or below the Z scores you then enter.