Investigations and Sampling


the use of statistics involves the gathering of data.

this data is then processed, organised and displayed.

finally the data is presented, discussed and conclusions are made.

Key Skills

  • plan the investigation
  • choose an appropriate sample
  • design an effective questionnaire or interview
  • display the data clearly
  • process and analyse the data
  • report on the results


censuspopulationsamplebiasstatistics, target population,data, random samplerandom numbersystematic sampling, cluster samplingstratified sampling.