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Qualitative and Quantitative Sampling
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Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Chapter 8: Qualitative and Quantitative
Sampling
Social Research MethodsMAN-10
Erlan Bakiev, Ph. D
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Reasons for Sampling
• Sample
• Population
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Representative Sampling
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Nonprobability Sampling
• Convenience sampling
• Quota sampling
• Purposive sampling
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Probability SamplingLanguage of Probability Sampling
• Sampling element
• Population
• Target population
• Sampling frame
• Sampling ratio
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Probability Sampling
• Parameter
• Statistic
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Probability Sampling
• Random sample• Sampling error
• Five Ways to Sample Randomly
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Probability Sampling
• Simple random sample– Random-number table
– Sampling distribution
– Central limit theorem (CLT)
– Confidential interval
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Probability Sampling
• Systematic sampling– Sampling interval
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Probability Sampling• Stratified sampling
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Probability Sampling
• Cluster sampling– Within-household sampling
– Probability proportionate to size (PPS)
• Random-digit dialing (RDD)
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How large should a sample be?
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Drawing Inferences
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Goal is NOT a Representative Sample
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Nonprobability Sampling
• Purposive sampling
• Snowball sample
• Deviant case sampling
• Sequential sampling
• Theoretical sampling
Snowball sampling
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• Adaptive Sampling
• Hidden populations
