Difference between revisions of "Inferential statistics"
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| − | In many epidemiological studies, it is not possible to include every individual in a population. Rather, a [[Sampling strategies|sample]] of individuals is collected. This may be take the form of a [[Study design#Surveys|survey]], a [[Study design#Cross sectional studies|cross-sectional study]], a [[Study design#Experimental studies|randomised controlled trial]], and so on. The important issue is that '''not every individual in the [[Source population | + | In many epidemiological studies, it is not possible to include every individual in a population. Rather, a [[Sampling strategies|sample]] of individuals is collected. This may be take the form of a [[Study design#Surveys|survey]], a [[Study design#Cross sectional studies|cross-sectional study]], a [[Study design#Experimental studies|randomised controlled trial]], and so on. The important issue is that '''not every individual in the [[Sampling strategies#Source population|source population]] is included, which means that [[Random error| random, or sampling, error]] and [[Bias|biases]] may be introduced. |
[[Category:Veterinary Epidemiology - Statistical Methods|D]] | [[Category:Veterinary Epidemiology - Statistical Methods|D]] | ||
Revision as of 13:47, 9 May 2011
In many epidemiological studies, it is not possible to include every individual in a population. Rather, a sample of individuals is collected. This may be take the form of a survey, a cross-sectional study, a randomised controlled trial, and so on. The important issue is that not every individual in the source population is included, which means that random, or sampling, error and biases may be introduced.