statistical significance

The likelihood of differences in data arising only due to chance, expressed in a p-value. The lower that value, the higher the chance that the found differences are genuine and not just due to chance.

Conventional cut-off points for significance:

  • p < 0.05 (the highest p-value that still allows for the differences to be labelled significant. This expresses that there is a 5% chance that the results are due to chance)
  • p < 0.01
  • p < 0.001

For more details, refer to the data analysis and statistics page.