Changes

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#Sampling strategies|source population]] is included, which means that [[Random error| random, or sampling, error]] may be introduced, as well as [[Bias|biases]].

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]]