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Statistical Methods 13 Sampling Techniques - statstutor
www.statstutor.ac.ukSampling techniques: " Non-random " Random Peter&Samuels& Birmingham&City&University& Reviewer:&Ellen&Marshall& www.statstutor.ac.uk& University&of&Sheffield& Sample surveys Subjects included in a study can be selected using either: ! A non-random sampling approach, or ! A random sampling approach