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SOCI 217 (66)
Lecture

socio217

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Department
Sociology
Course
SOCI 217
Professor
Keith Preston
Semester
Fall

Description
217 November 9 2011Probability sampling y If all members of a population students were identical in all respects age gender attitudes no need for sampling y To provide useful descriptions of the total population studentsa sample must contain the same variations that exist in the population y Probability samplingbased on theories of probability from mathematics y Required avoidance of unconscious sampling biaswhen those selected are not representative of the larger population y Bias occurs because of o Convenience sampling o Researcher subjectivity in choosing respondents o Selfselection phonein loginInterested in parties only y Representative if aggregate characteristics of sample closely approximate those of the population y Basic principalall members of a population should have an equal chance of being selected o EPSEM o SRSsimple random samplingJar of 500
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