DEFINITION of 'Population'
The entire pool from which a statistical sample is drawn. The information obtained from the sample allows statisticians to develop hypotheses about the larger population. Researchers gather information from a sample because of the difficulty of studying the entire population. In statistical equations, population is usually denoted with a capital 'N', while the sample is usually denoted with a lowercase 'n'.
INVESTOPEDIA EXPLAINS 'Population'
For example, let's say a denim apparel manufacturer wants to check the quality of the stitching on its blue jeans before shipping them off to retail stores. It is not cost effective to examine every single pair of blue jeans the manufacturer produces (the population). Instead, the manufacturer looks at just 50 pairs (a sample) to draw a conclusion about whether all 500 pairs of jeans produced (the population) are likely to have been stitched correctly.

Uniform Distribution
In statistics, a type of probability distribution in which all ... 
Symmetrical Distribution
A situation in which the values of variables occur at regular ... 
Negative Correlation
A relationship between two variables in which one variable increases ... 
Positive Correlation
A relationship between two variables in which both variables ... 
Simple Random Sample
A subset of a statistical population in which each member of ... 
Unconditional Probability
The probability that an event will occur, not contingent on any ...

What are the advantages and disadvantages of stratified random sampling?
Researchers use stratified random sampling to obtain a sample population that best represents the entire population being ... Read Full Answer >> 
What are some examples of stratified random sampling?
Simple random sampling is a sample of individuals that exist in a population; the individuals are randomly selected from ... Read Full Answer >> 
What is the variance/covariance matrix or parametric method in Value at Risk (VaR)?
The parametric method, also known as the variancecovariance method, is a risk management technique for calculating the value ... Read Full Answer >> 
What is backtesting in Value at Risk (VaR)?
The value at risk is a statistical risk management technique that monitors and quantifies the risk level associated with ... Read Full Answer >> 
How much variance should an investor have in an indexed fund?
An investor should have as much variance in an indexed fund as he is comfortable with. Variance is the measure of the spread ... Read Full Answer >> 
Can the correlation coefficient be used to measure dependence?
The correlation coefficient can be used to measure the linear dependence between two random variables. The most common correlation ... Read Full Answer >>

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