Charts for counts
Use this tool for drawing charts of road casualty numbers or other counts of events
(technically known as Poisson distribution data).
Enter actual counts - not averages or proportions.
Unsure what to do? Try these examples:
Enter the data in the boxes:
If more than one, separate them by commas
Separate by commas if more than one
Chart title (optional):
Title font size:
After inputting or changing data, select 'Draw / refresh chart':
Right-click on the chart to save it to your PC.
The values and the formula used for the 95% confidence intervals are taken from
Statistics with Confidence
(2000) BMJ Books