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Published byJared Black Modified over 8 years ago
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Determining the Sample Plan zSampling - Use of a small number of items in a population to make conclusions about the whole population.
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Determining the Sample Plan zSample – A subset of a larger population.
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Determining the Sample Plan zSample Frame – Working list of the entire population.
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Determining the Sample Plan zPopulation – Any complete group sharing some common set of characteristics.
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Determining the Sample Plan zPopulation element – One member of the population.
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Determining the Sample Plan zCensus – An investigation of all individual elements in a population.
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Types of samples zProbability - Population members have a known chance of being selected into the sample.
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Probability Samples zSimple random sampling – Each element in the population has a known and identical chance of being included in the sample.
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Probability Samples zSystematic sampling – Starting point is selected by random process and every nth number on the list is selected.
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Probability Samples zStratified sampling 1. Researcher chooses strata (subgroups). 2. Subsamples are drawn from within each stratum (subgroup) using simple random or systematic sampling procedure.
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Probability Samples zCluster sampling 1. Researcher chooses strata (subgroups). 2. Simple random or systematic sample of subgroups is drawn.
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Types of samples zNonprobability - Probability of selecting any specific population element is unknown.
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Nonprobability sampling zConvenience sampling – Researcher obtains individuals who are most conveniently available.
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Nonprobability sampling zJudgment sampling - Researcher selects sample based on his or her experienced judgment.
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Nonprobability sampling zQuota sampling – technique designed to ensure that various subgroups in a population are represented.
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Nonprobability sampling zSnowball (referral) sampling – researcher uses referrals to locate rare or hard-to-find populations.
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Sample Size Determination Methods Arbitrary Approach
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Sample Size Determination Methods Conventional Approach
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Sample Size Determination Methods Cost Basis Approach
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Sample Size Determination Methods Confidence Interval Approach
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