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Statistical Methods 13 Sampling Techniques - statstutor

Community project encouraging academics to share statistics support resources All stcp resources are released under a Creative Commons licence Statistical Methods 13 Sampling Techniques Based on materials provided by Coventry University and Loughborough University under a Na9onal HE STEM Programme Prac9ce Transfer Adopters grant Peter Samuels Reviewer: Ellen Marshall Birmingham City University University of She eld Workshop outline We will consider: q Sampling Techniques : Non-random Random Peter Samuels Reviewer: Ellen Marshall Birmingham City University University of She eld Sample surveys Subjects included in a study can be selected using either: q A non-random Sampling approach, or q A random Sampling approach Peter Samuels Reviewer: Ellen Marshall Birmingham City University University of She eld Non-random Sampling q Types: Self-selecting samples Convenience samples Judgemental samples Quota Sampling : The interviewer has been given quotas to fill from specified subgroups of the population, 20 women 20-30 years old q Can all be very biased q Not representative of population Peter Samuels Reviewer

Sampling 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

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