1. GCSE Statistics
Population Pyramids

2. Population pyramids look similar to back to back histograms
They make it easy to compare aspects of population, often by gender.
They usually have class sizes, and therefore bars, the same width

4. Differences with the material in the book
Scale at right hand side not in middle
Data is scaled as a percentage
Page 101 example 10
Note information for drawing population pyramid on right hand side
Page 102 example 11
Note the examiners tip – when comparing two populations, use general statements rather than individual figures

5. Your turn question 1 and 2 exercise 3F page 105