Statistics basics
Statistics is the art of saying something honest about a lot of numbers at once. This course covers the summaries, the shapes and the reasoning from a sample to a population.
What you'll learn
10 chapters, then the quiz
- 01What statistics is forDescribing and inferring.
- 02AveragesThree answers to where the middle is.
- 03SpreadHow far things sit from the middle.
- 04DistributionsThe shape of the data.
- 05SamplingWhere conclusions are won or lost.
- 06Confidence and errorSaying how sure you are.
- 07Testing a claimHypotheses and p-values.
- 08Relationships between variablesCorrelation and regression.
- 09How statistics misleadUsually without lying.
- 10Doing it wellHabits that keep you honest.
More math & logic tests
See all →- Easy
Mental math sprint
Arithmetic you should be able to do without reaching for a calculator.
8 questions5 min - Hard
Logic puzzles
Short problems where the obvious answer is usually the wrong one.
7 questions9 min - Medium
Probability basics
Coins, dice and cards, plus the traps that come with them.
7 questions7 min