Mathematics·Probability·conceptual
The Probability Scale
Understand probability as a measure on a scale from 0 (impossible) to 1 (certain); use the language of probability including likely, unlikely, certain, and impossible
Suggested ages 11–13
Evidence of understanding
- Place everyday events on a 0-to-1 probability scale with justification
- Explain why a fair six-sided die gives each number a probability of 1/6
- Distinguish between equally likely outcomes (fair coin) and unequally likely outcomes (biased spinner)
Assessment prompt
Can The Probability Scale explain that probability goes from 0 (impossible) to 1 (certain), place events on that scale as numbers, and tell you whether a game is fair or not?
Standards alignment
7.SP.5US · ccss-math
Understand that the probability of a chance event is a number between 0 and 1
Common Core State Standards for Mathematics · 7
KS3.Maths.Prob.1GB · uk-nc-2013
Analyse Probability Experiments
The national curriculum in England: Key stages 1 and 2 framework document · Key Stage 3