MDM_samp_misc2

Sampling - Voluntary, Destructive, Convenience  

**Voluntary Sampling** is when an individual is given the opportunity to participate in the survey/poll. Usually strong bias is presented, due to people with an interest in the poll/survey subject tend to answer the questions, where as those who have less of an interest don't take the time to participate. Example: Online polls. You may or may not participate depending on your interest. 

**Destructive Sampling** is when a product is tested over its full potential. The sample is destroyed during the testing process. Not used on people! Example: When you run over your nalgeen bottle with a car. (They are said to be indestructible), or seeing how far you can bend a plastic ruler until it breaks. 

**Convenience Sampling** is one of the most common sampling methods. It is when you sample/survey individuals that are the easiest to reach. Therefore you do not have to go out of your way to gather information. Convenience sampling is considered bias because it does not represent the entire population. Example: When you ask someone to take your survey/poll at your local mall or in your classroom. 

Non-probability Sampling (2009, April 20). Non-probability Sampling. //Learning Resources: Statistics Canada.// Retrieved October 27, 2009, from []

Canton, B.J., Erdman, W., Irvine, J., Lim, L., McLaren, F., Meisel, R.W. et al. (2002). //Mathematics of Data Management: Sampling Techniques.// Canada: McGraw-Hill Ryerson Limited.