Click on the following links. Please note these will open in a new window.

• This link will give you a practical guide to sampling in a downloadable PDF
   
• Stat Trek contains useful material on sampling in general and a range of different methods
   
• This link contains reviews of different kinds of non-probability sampling and when it may be okay to use them
   
• The Statistics Canada site discusses a range of sampling types
   
• There are a number of sample size calculation sites on the web.  The following are all helpful:

• http://www.surveysystem.com/sscalc.htm
• http://www.calculator.net/sample-size-calculator.html
• http://www.raosoft.com/samplesize.html
• http://danielsoper.com/statcalc3/category.aspx?id=19
• http://bold-ed.com/calculator.htm