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Researching Target Markets: Difference between revisions
→Week 12: definition of w:simple random sample
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* '''[[w:Stratified sampling|Stratified sampling]]''': In [[w:statistical survey|statistical survey]]s, when subpopulations within an overall population vary, it is advantageous to sample each subpopulation (stratum) independently. '''Stratification''' is the process of dividing members of the population into homogeneous subgroups before sampling. ( Wikipedia ) | * '''[[w:Stratified sampling|Stratified sampling]]''': In [[w:statistical survey|statistical survey]]s, when subpopulations within an overall population vary, it is advantageous to sample each subpopulation (stratum) independently. '''Stratification''' is the process of dividing members of the population into homogeneous subgroups before sampling. ( Wikipedia ) | ||
* A '''[[w:simple random sample|simple random sample]]''' is a subset of [[w:individuals|individuals]] (a [[w:sample (statistics)|sample]]) chosen from a larger set (a [[w:statistical population|population]]). | |||
:::Each individual is chosen [[w:randomization|randomly]] and entirely by chance, such that each individual has the same [[w:probability|probability]] of being chosen at any stage during the sampling process, and each subset of ''k'' individuals has the same probability of being chosen for the sample as any other subset of ''k'' individuals. This process and technique is known as '''simple random sampling''', and should not be confused with [[w:Systematic sampling|systematic random sampling]]. A simple random sample is an unbiased surveying technique. ( Wikipedia ) | |||
= Statistical Methods = | = Statistical Methods = | ||