This site provides resources to assist students in understanding introductory statistics. Multimedia instruction, demonstrations, case studies and an analysis lab are provided. Topics covered include analysis of...

This site, presented by the Department of Statistics at Yale University, gives an explanation of, a definition for and an example of sample means. Topics include mean, variance, distribution, and the central limit...

This activity stresses the importance of writing clear, unbiased survey questions. It explores the types of bias present in surveys and ways to reduce these biases. In addition, the activity covers some basics of...

Using the Fisher r-to-z transformation, this page will calculate a value of z that can be applied to assess the significance of the difference between r, the correlation observed within a sample of size n and rho, the...

This group activity illustrates the concepts of size and power of a test through simulation. Students simulate binomial data by repeatedly rolling a ten-sided die, and they use their simulated data to estimate the size...