High school statistics

Explore

Practice
Mission
Start from the basics
Learn the basics, starting with Creating and interpreting scatterplots
Practice for your next test
Get some practice with 45 different exercises
Let us guide the way
Sign up and start a mission, your personalized learning journey

Scatterplots

Scatterplots show us relationships and patterns in data, and we use those patterns to make predictions.
Creating and interpreting scatterplots
Estimating with trend lines

Data distributions

Data makes more sense when we graph it and summarize it with numbers.
Displays of distributions
Summarizing center of distributions (central tendency)
Summarizing spread of distributions
Box and whisker plots
Comparing distributions

Two-way tables

Two-way tables show us relationships between categorical variables.
Two-way frequency tables
Two-way relative frequency tables

Study design

Getting reliable data is vital if we want to make correct conclusions.The process of collecting data through studies involves sampling, observations, surveys, and experiments.
Samples and surveys
Observational studies and experiments

Probability

Few things are certain in life. Probability gives us an idea of the likelihood or unlikelihood of different outcomes.
Probability basics
Counting with permutations
Counting with combinations
Probability with counting, permutations, combinations
Multiplication rule for independent events
Multiplication rule for dependent events
Addition rule for probability
Conditional probability
Simulation and randomness
Expected value

Binomial probability

If you roll five dice, what’s the probability that three of them show a 6? In a group of 20 strangers, what’s the probability that more than half of them were born in the summer? Learn about binomial probability to answer these types of problems.
Binomial probability

Normal distributions

A Normal distribution is a very special and common distribution that is fundamental to learning about statistics. Normal distributions describe many real world phenomena from scores on exams to lengths of wings on bugs.
Normal distributions

Staff picks

The Monty Hall problem
Basic set notation
Probability with permutations and combinations
Concept check: Standard deviation
R-squared or coefficient of determination

Get Started

Creating and interpreting scatterplots
Do people who eat more vegetables tend to be happier? Is crime getting better or worse over time? In this tutorial we'll make scatterplots to see if there is a correlation between two variables.
Start learning
Community questions
Practice