Term
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Definition
| A collection of data obtained from every member of the population of interest |
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Term
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Definition
| A subset of all the members of a population of interest |
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Term
| Steps in Developing a Sampling Plan |
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Definition
| 1. Define the population, 2. Choose a Data Collection Method, 3. Identify a Sampling Frame, 4. Select a Sampling Method, 5. Determine Sample Size, 6. Develop Operational Procedures for Selecting Sample Elements, 7.Execute the Operational Sampling Plan |
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Term
| Probability vs. Nonprobability Sample |
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Definition
| Probability Sample- every element of the population has a known and equal likelihood of being selected. |
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Term
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Definition
| Probability sample selected by assigning a number to every element of the population and then using a table of random numbers to select specific elements for inclusion in the sample |
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Term
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Definition
| Probability sampling in which the entire population is numbered and elemnts are selected using a skip interval |
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Term
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Definition
| Probability sample that is forced to be more represenative though simple random sampling of mutually exclusive and exhaustive subsets |
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Term
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Definition
| Probability sample in which the sampling units are selected in groups to reduce data collection |
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Term
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Definition
| Population size / Sample Size |
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Term
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Definition
| Sampling in which the number of elements selected from a stratum is directly proportional to the size of the stratum relative to the size of the population |
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Term
| Disporportional or optimal allocation |
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Definition
| Sampling in which the number of elements taken from a given stratum is proportional to the relative size of the stratum and the standard deviation of the characteristic under consideration |
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Term
| One-stage versus Two-stage Cluster sampling |
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Definition
| One-stage = if the sample consists of all elements in the selected subsets. Otherwise if the sample of elements is chosen in some probabilistic manner then it's a two-stage |
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Term
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Definition
| Nonprobability samples used primarily for reasons of convenience |
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Term
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Definition
| Nonprobability samples in which the selection criteria are based on the researcher's personal judgement |
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Term
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Definition
| Nonprobability samples in which quotas, based on demographic of classification factors selected by the researcher are established for population subgroups |
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Term
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Definition
| Nonprobability samples in which additional respondents are selected base on referals from initial respondents |
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Term
| Qualitative factors in determining sample size... |
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Definition
| 1. Estimate of the population standard deviation, 2. The acceptable level of sampling error, 3. The desired level of confidence that the sample result will fall within |
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