Topic explanation

Standard explanation

Use class midpoints or given weights to calculate a representative average when raw values are not listed.

Key points

• grouped mean and weighted mean
• understand the idea
• apply it carefully
• keep the ideas separate
• Grouped Mean And Weighted Mean: Use class midpoints or given weights to calculate a representative average when raw values are not l
• WHAT — GROUPED MEAN AND WEIGHTED MEAN: Use class midpoints or given weights to calculate a representative average when raw values are not l
• HOW — Use the idea: Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check
• CORE UNDERSTANDING: Use class midpoints or given weights to calculate a representative average when raw values are not l

Labelled diagram