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| Any technique in which samples are selected in some way not suggested by probability theory |
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| Where the units to be observed are selcted on the basis of the researcher's judgment about which ones will be the most useful or representative. aka Judgmental sampling. |
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| non-prob. often employed in field research, whereby each person interviewed may be asked to suggest additional people for interviewing. |
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| non-prob. units are selected into a sample on the basis of pre specified characteristics, so that the total sample will have the same distribution of characteristics assumed to exist in the population being studied. |
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| Someone who will tell you what you need to know |
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| general term for samples selected iin accord with the prob. theory, typically involving some random-selection mechanism. |
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| (Equal prob. of selection method.) Everyone has an equal chance of being selected |
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| that unit of which a pop is composed and which is selected in a sample |
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| the theoretically specified aggregation of the elements in a study |
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| that aggregation of elements from which a sample is actually selected. |
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| a sampling method in which each element has an equal chance of selection independent of any other even in the selection process |
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| that element or set of elements considered for selection in some stage sampling |
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| the summary description of a given variable in a population |
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| the summary description of a variable in a sample, used to estimate a population parameter |
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| the degree of error to be expected in probability sampling. |
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| the formula for determining sampling error contains these 3 factors... |
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| the parameter, the sample size and the standard error |
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| the estimated probability that a population parameter lies within a given confidence interval |
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| the range of values within which a population parameter is estimated to lie |
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| that list or quasi list of units composing a population from which a sample is selected. |
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| a type of probability sampling in which the units composing a pop are assigned numbers. A set of random numbers is then generated, and the units having those numbers are included in the sample |
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| a type in witch every kth unit in a list is selected for inclusion in the sample. i.e. every 25th student... |
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| the standard deviation (k) between elements selected from a population for a sample |
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| the proportion of elements in the population that are selected to be in a sample |
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| sampling interval equation |
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| population size divided by sample size |
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| sample size divided by population size |
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| the grouping of the units composing a population into homogeneous groups (or strata) before sampling |
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| a multistage sampling in which natural groups (clusters) are sampled initially, with the members of each selected group being subsampled afterward |
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| (Probability proportionate to size) This refers to a type of multistage cluster sample in which clusters are selected, not with equal probabilities but with probabilities proportionate to their sizes - as measured by the number of units to be subsampled |
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| assigning different weights to cases that were selected into a sample with different probabilities of selection. |
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