DEFINITION of 'Sampling Error'
A statistical error to which an analyst exposes a model simply because he or she is working with sample data rather than population or census data. Using sample data presents the risk that results found in an analysis do not represent the results that would be obtained from using data involving the entire population from which the sample was derived.
INVESTOPEDIA EXPLAINS 'Sampling Error'
The use of a sample relative to an entire population is often necessary for practical and/or monetary reasons. Although there are likely to be some differences between sample analysis results and population analysis results, the degree to which these can differ is not expected to be substantial.
Methods of reducing sampling error include increasing the sample size and ensuring that the sample adequately represents the entire population.

Representative Sample
A subset of a statistical population that accurately reflects ... 
Standard Error
The standard deviation of the sampling distribution of a statistic. ... 
Statistical Significance
A result that is not likely to occur randomly, but rather is ... 
Regression
A statistical measure that attempts to determine the strength ... 
Heteroskedastic
A measure in statistics that refers to the variance of errors ... 
Homoskedastic
A statistics term indicating that the variance of the errors ...

How do researchers ensure that a simple random sample is an accurate representation ...
Researchers employ several safeguards to ensure that a simple random sample accurately represents a larger population. They ... Read Full Answer >> 
How can a representative sample lead to sampling bias?
A representative sample, like any other type of sample, by its very nature leads to a degree of sampling bias, or sampling ... Read Full Answer >> 
What percentage of the population do you need in a representative sample?
Technically, a representative sample requires only whatever percentage of the statistical population is necessary to replicate ... Read Full Answer >> 
What are the advantages of using a simple random sample to study a larger population?
Simple random sampling is a method used to cull a smaller sample size from a larger population and use it to research and ... Read Full Answer >> 
What assumptions are made when conducting a ttest?
The common assumptions made when doing a ttest include those regarding the scale of measurement, random sampling, normality ... Read Full Answer >> 
What is the utility function and how is it calculated?
In economics, utility function is an important concept that measures preferences over a set of goods and services. Utility ... Read Full Answer >>

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