an average is a number that represents or is typical of a sample.

three types of average are commonly used. the mean, the median and the mode.

calculators and computer spreadsheets are useful for analysing data.

Key Skills

  • calculate the mean, median and mode from a set of values or a frequency distribution
  • decide on the best of the three averages to use for a particular set of data
  • use calculators and spreadsheets to find averages


central tendencyaveragemeanmedianmodefrequencyparameterstatistic,
standard deviationcontinuous data, discrete data.