Charts for categorical and discrete data
Pages
Frequency tables
Tallying raw data into a frequency table and reading totals back out.
Grouped frequency tables
Sorting continuous data into inequality classes, one class for every value.
Bar charts
Drawing and reading bar charts: equal-width bars, gaps and a labelled axis.
Dual and composite bar charts
Two data sets on one chart, side by side or stacked, and reading a component.
Pictograms
Drawing and reading pictograms, where the key fixes what one symbol is worth.
Vertical line charts
The chart for ungrouped discrete numerical data, with bars shrunk to lines.
Drawing a pie chart
Turning frequencies into sector angles that total 360°, checked before drawing.
Interpreting a pie chart
Frequencies and proportions read from sector angles, and the comparison trap.
Practice
Grouped frequency tables
Sorting continuous data into inequality classes, one class for every value.
PracticeBar charts
Drawing and reading bar charts: equal-width bars, gaps and a labelled axis.
PracticeDual and composite bar charts
Two data sets on one chart, side by side or stacked, and reading a component.
PracticePictograms
Drawing and reading pictograms, where the key fixes what one symbol is worth.
PracticeVertical line charts
The chart for ungrouped discrete numerical data, with bars shrunk to lines.
PracticeDrawing a pie chart
Turning frequencies into sector angles that total 360°, checked before drawing.
PracticeBar charts and pie charts review
Reading charts, pictogram keys and sector angles.