About Our Statistics Tutorials

Stat Trek's free, online tutorials get you productive as quickly and painlessly as possible. Topics are introduced in short, easy-to-understand lessons; and on-line Help is just a mouse click away.

Advanced Placement (AP) Statistics

    The Advanced Placement (AP) Statistics Tutorial helps students prepare for the Advanced Placement (AP) Statistics Exam. The tutorial features:

• Clear, concise lessons on all topics covered by the AP Statistics Exam.
• Practice and review questions, including detailed explanations of correct solutions.

The Advanced Placement (AP) Statistics Tutorial walks you through skills step by step, at your own pace. Sample problems reinforce learning. Lessons explain technical terms in "aw shucks" language, so you are never confused by statistical jargon. > Go to AP Statistics Tutorial

Introduction to Statistics and Probability

    The Statistics and Probability Tutorial includes all of the lessons from the AP Statistics Tutorial, and more! Find out how to:

• Compute the probability that a particular event will occur.
• Use the right probability distribution (normal, t, binomial, etc.) for your analysis.
• Estimate population means and proportions, based on sample data.
• Determine margin of error and confidence levels.
• Test hypotheses about means and proportions.
• Choose the sample design that yields maximum precision for minimum cost.
• And much more . . .

Packed with clear explanations and hands-on examples, this practical tutorial expertly guides you through the fundamentals of probability and statistics. > Go to Statistics and Probability Tutorial

How Much Does It Cost To Use the Tutorials?

The tutorials are free. Happily, there is no charge.

So how, you ask, can we make money? The secret is volume. Okay, we're not very good at business. But, trust us. We're better at statistics.

Who are These Tutorials For?

These tutorials are for you if:

• You are new to statistics and probability or you want to refresh dormant skills.
• You want to solve common statistics problems quickly and easily without having to call somebody for help.

What Level of Expertise is Assumed?

Each tutorial assumes that you are comfortable with arithmetic (addition, substraction, multiplication, and division), as well as basic algebra.

How Should You Use The Tutorials?

Individual lessons are accessible directly through links in the table of contents, which appear on the left side of the page. If you are already familiar with probability and statistics, you can choose any lesson at random and work effectively.

However, if you are new to statistics, you should work through lessons in the order in which they appear; because each lesson builds on previous lessons.

As you progress through the tutorials, take advantage of the following helpful resources.

• Analytical tools. Stat Trek provides a variety of analytical tools - on-line statistical tables, calculators, problem solvers - to take the drudgery out of statistical computations. The tutorial will alert you to these tools, especially those that are provided free.
  
  
• Sample problems. Most of the lessons include sample problems. The sample problems help you test your knowledge. They also illustrate shortcuts and solutions to common statistics problems.
  
  
• On-line help. The Stat Trek Glossary takes the mystery out of statistical jargon. If any term or concept is unclear, visit the Glossary for additional explanation.

Note: The Glossary can be accessed through the Help link that appears in the header at the top of every Stat Trek web page.