Statistics Help

The lessons below cover the core topics of introductory statistics: measures of center, measures of spread, and the basics of probability. Each lesson includes worked examples.

Lessons

• Arithmetic Mean
• Median
• Mode
• Range
• Standard Deviation
• Geometric Mean
• Probability
• Compound Probability
• Permutations
• Combinations
• Rolling the Dice

Calculators

• Summation Calculator — compute sums and series instantly
• Matrix Calculator — multiply matrices and solve systems

More Resources

• Mean, Median, Mode (MathGoodies.com)
• Normal Distribution (Wikipedia)
• Normal Distribution (Wolfram)
• Some Basic Statistics Lessons (aaaMath)
• Statistics and Probability (Khan Academy) - Comprehensive course with 325 videos covering all levels
• Mean and Median (Stat Trek) - How to compute and compare measures of central tendency
• Variability in Data (Stat Trek) - Range, IQR, variance, and standard deviation explained
• Standard Error (Stat Trek) - Understanding standard error of estimates
• Probability Tutorial (Stat Trek) - Clear introduction to probability concepts
• AP Statistics Tutorial (Stat Trek) - Complete AP exam prep course
• Sampling Distribution of the Mean (Stat Trek) - How to work with sampling distributions
• Linear Regression Tutorial (Stat Trek) - Simple and multiple regression explained
• ANOVA Tutorial (Stat Trek) - Analysis of variance for experimental design
• Probability & Statistics (OLI) (CMU.edu) - Free university-level course with interactive simulations
• Statistics Tutorial (w3schools) - 36 lessons with interactive Python/R code examples
• Statology Statistics Guides (Statology) - Clear explanations and practical examples