Relative Frequency

How often something happens divided by all outcomes.

Example: Your team has won 9 games from a total of 12 games played:

  • the Frequency of winning is 9
  • the Relative Frequency of winning is 9/12 = 75%

All the Relative Frequencies add up to 1 (except for any rounding error).

Example: Travel Survey

92 people were asked how they got to work:

  • 35 used a car
  • 42 took public transport
  • 8 rode a bicycle
  • 7 walked

The Relative Frequencies (to 2 decimal places) are:

  • Car: 35/92 = 0.38
  • Public Transport: 42/92 = 0.46
  • Bicycle: 8/92 = 0.09
  • Walking: 7/92 = 0.08

0.38+0.46+0.09+0.08 = 1.01

(It would be exactly 1 if we had used perfect accuracy),

Try it for yourself:


View Larger