Stattrek Information

If this is your first visit to StatTrek.com, welcome. Our mission is to help you solve common statistics problems - quickly, easily, and cost-effectively. We try to take the drudgery out of statistics by providing user-friendly instructional and analytical tools. Stat Trek provides six free, online tutorials: Advanced Placement (AP) Statistics. The AP Statistics tutorial is designed to help students master the Advanced Placement Statistics Examination. Probability. The Probability tutorial covers probability theory in aw-shucks language. Clear explanations and pages of solve probability problems. Linear Regression. The Linear Regression tutorial is a pain-free introduction to regression. It explains how to predict scores on one variable, based on scores on one or more other variables. Analysis of Variance. The Analysis of Variance tutorial explains how to use analysis of variance to assess the effect of one or more independent variables on a dependent variable. Survey Sampling. The Survey Sampling tutorial describes three probability methods for selecting and analyzing sample data - simple random sampling, stratified sampling, and cluster sampling. Matrix Algebra. The Matrix Algebra tutorial is an easy-to-understand introduction to matrix algebra. It covers matrix nomenclature, matrix notation, and common matrix operations. Topics are introduced in short, easy-to-understand lessons. Technical terms are linked to their definitions; so online help is just a mouse click away. We offer a wide range of analytical tools to support topics covered in the tutorials. These tools include: