GCSE Maths Statistics: lesson and practice questions

By the end of this chapter you will be able to

• Classify data as categorical, discrete or continuous, and collect it with tally charts, frequency tables, two-way tables and questionnaires
• Spot bias, choose a fair sample, find a stratified sample and estimate a population with capture-recapture
• Find the mean, median, mode and range from a list, a frequency table and a grouped frequency table
• Draw and read bar charts, pictograms, vertical line charts, pie charts, line graphs, time series and stem-and-leaf diagrams
• Draw scatter graphs, describe correlation, draw a line of best fit and use it to estimate (and know the dangers of extrapolating)
• Compare distributions using an average and a measure of spread

You should already know

• Fractions, decimals and percentages of amounts (Chapters 3, 4 and 5)
• Reading scales and plotting coordinates (Chapter 12)
• Angles at a point and using a protractor (Chapter 17)
• Ratio and proportion (Chapter 15)

Where this leads

• Probability and relative frequency (Chapter 23)
• Interpreting graphs of real-life situations (Chapters 12 and 13)
• Using data in exam problem solving across the course