BMKT 312 Sampling 1 Study Guide

# Researchers might use a stratified sample to produce

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Unformatted text preview: respect to key variables. Researchers might use a stratified sample to produce sample statistics that are more precise (i.e., have smaller sampling error) than simple random samples or in order to investigate characteristics of interest for particular subgroups. Cluster Sampling: Like stratified sampling, the population is divided into mutually exclusive and exhaustive subsets. However, unlike stratified sampling, a simple random sample of subsets (i.e., clusters) is chosen. This approach is most appropriate when subsets (or strata) are heterogeneous within but homogeneous between with respect to key variables. Area sampling is a form of cluster sampling that uses census tracks or city blocks as sampling units. Key Terms Census A type of sampling plan in which data are collected from or about each member of a population. Sample Selection of a subset of elements from a larger group of objects. BMKT 312 Sampling 1 Study Guide . 4 Population All cases that meet designated specifications for membership in the group. Incidence The percent of a general population or group that qualifies for inclusion in the population. Parameter A characteristic or measure of a population. Statistic A characteristic or measure of a sample. Sampling error The difference between results obtained from a sample and results that would have been obtained had information been gathered from or about every member of the population. Sampling frame The list of population elements from which a sample will be drawn; the list could consist of geographic areas, institutions, individuals, or other units. Probability sample A sample in which each target population element has a known, nonzero chance of being included in the sample. Nonprobability sample A sample that relies on personal judgment in the element selection process. Fixed sample A sample for which size is determined in advance and needed information is collected from the designated elements. Sequential sample A sample formed on the basis of...
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## This note was uploaded on 02/13/2014 for the course BMKT 312 taught by Professor Surajcommuri during the Fall '13 term at SUNY Albany.

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