stats homework help

Teach yourself statistics

Statistics and Probability

This website provides training and tools to help you solve statistics problems quickly, easily, and accurately - without having to ask anyone for help.

Online Tutorials

Learn at your own pace. Free online tutorials cover statistics, probability, regression, analysis of variance, survey sampling, and matrix algebra - all explained in plain English.

• Advanced Placement (AP) Statistics . Full coverage of the AP Statistics curriculum.
• Probability . Fundamentals of probability. Clear explanations with pages of solved problems.
• Linear Regression . Regression analysis with one or more independent variables.
• ANOVA . Analysis of variance made easy. How to collect, analyze, and interpret data.
• Survey Sampling . How to conduct a statistical survey and analyze survey data.
• Matrix Algebra . Easy-to-understand introduction to matrix algebra.

Practice and review questions reinforce key points. Online calculators take the drudgery out of computation. Perfect for self-study.

AP Statistics

Here is your blueprint for test success on the AP Statistics exam.

• AP Tutorial : Study our free, AP statistics tutorial to improve your skills in all test areas.
• Practice exam : Test your understanding of key topics, through sample problems with detailed solutions.

Be prepared. Get the score that you want on the AP Statistics test.

Random Number Generator

Produce a list of random numbers, based on your specifications.

• Control list size (generate up to 10,000 random numbers).
• Specify the range of values that appear in your list.
• Permit or prevent duplicate entries.

Free and easy to use.

Sample Size Calculator

Create powerful, cost-effective survey sampling plans.

• Find the optimum design (most precision, least cost).
• See how sample size affects cost and precision.
• Compare different survey sampling methods.
• Assess statistical power and Type II errors.

Tailor your sampling plan to your research needs.

Stat Toolbox

Check out our statistical tables and online calculators - fast, accurate, and user-friendly.

Discrete probability distributions

• Hypergeometric
• Multinomial
• Negative binomial
• Poisson distribution

Continuous probability distributions

• f-Distribution
• Normal distribution
• t-Distribution

Special-purpose calculators

• Bayes Rule Calculator
• Combination-Permutation
• Event Counter
• Factorial Calculator
• Bartlett's Test Calculator
• Statistics Calculator
• Probability Calculator

Each calculator features clear instructions, answers to frequently-asked questions, and a one or more problems with solutions to illustrate calculator use.

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AP®︎/College Statistics

Unit 1: exploring categorical data, unit 2: exploring one-variable quantitative data: displaying and describing, unit 3: exploring one-variable quantitative data: summary statistics, unit 4: exploring one-variable quantitative data: percentiles, z-scores, and the normal distribution, unit 5: exploring two-variable quantitative data, unit 6: collecting data, unit 7: probability, unit 8: random variables and probability distributions, unit 9: sampling distributions, unit 10: inference for categorical data: proportions, unit 11: inference for quantitative data: means, unit 12: inference for categorical data: chi-square, unit 13: inference for quantitative data: slopes, unit 14: prepare for the 2022 ap®︎ statistics exam.