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PSCI 2701 (45)
Lecture

PSCI2701B - Class 10 - Nov 19 2013.docx

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Department
Political Science
Course
PSCI 2701
Professor
Simon Langlois- Bertrand
Semester
Fall

Description
PSCI2701BClass 10Nov 19 2013From previous class notes lecture 9Nonprobability samplingA specific reason why we select certain casesno random selectionConvenientvolunteeraccidental samplingoNeed people to participate in your survey wont claim great things about the whole populationoDont necessarily claim to have a perfect sampleoPick the samples that are more convenientwilling to participatePurposive samplingoHaving specific purposes for your casesoEg having a limited sample only few are relevant so you have to talk to themSnowball samplingoDont have a list to build off of cant find a perfect listoEg members of terrorist groupsmafia membersmarijuana users Identify a few retired members arrested people and start with themAsk them questions if they can hook you up with other membersSnowball from hereoResearchers will try to find different networks starting from 4 or 5 people who dont know eachotherQuotaoSample with different members from different organizations that you tried to researchHow to choose sample sizeIncreasing the sample size should cause representativeness to decrease
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