Module 9 Chapter 14
 Surveys and Sampling

The key ideas for this chapter:
 
  • You need to be able to write questionnaires
  • You need to be able to select an unbiased sample
  • You should be able to select a random sample using the random number key on your calculator, or a list of random numbers.
  • You should understand how to select a stratified sample
     
    		•

    		Revision notes for this topic:
     
      A page about stratified sampling
    Most of the theorems, all on one page.
    from Richard Tang's Revise GCSE site
     

    		Useful Links:
      1. Learn about planning a survey and designing questionnaires
    from bbc.co.uk
     
     
    2. Test yourself with this activity about questionnaires
    from bbc.co.uk
     

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    3. Learn about sampling
    4. Test your skills with this online homework.
    from mymaths,co.uk
     

    Requires you to log in -
    why?

    Get Flash Player
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