The 0-to-1 Probability Scale

Description

Understand probability as a measure expressed as a number between 0 (impossible) and 1 (certain); place events on the probability scale; express probabilities as fractions, decimals, and percentages

Mastery Evidence

• ✓ Place events on a number line from 0 (impossible) to 1 (certain), expressing positions as fractions or decimals
• ✓ Explain that a probability of 0.5 means 'even chance' and connect this to the informal word 'likely'
• ✓ Convert between informal language ('very unlikely') and a numerical position on the 0-to-1 scale