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 ... 
Probability Distribution
A statistical function that describes all the possible values ...

What are some of the uses of the coefficient of variation (COV)?
In statistics, the coefficient of variation (COV) is a simple measure of relative event dispersion. It is equal to the ratio ... Read Full Answer >> 
What is the difference between systematic sampling and cluster sampling?
Systematic sampling and cluster sampling differ in how they pull sample points from the population included in the sample. ... Read Full Answer >> 
How can I use systematic sampling in finance?
Systematic sampling is useful in finance for situations where it is impractical to review the entire population for certain ... Read Full Answer >> 
What are the best selection methods for creating a simple random sample?
The best selection methods for selecting a simple random sample are the lottery method, using a random number table or having ... Read Full Answer >> 
What are the disadvantages of using a simple random sample to approximate a larger ...
Simple random sampling statistically measures a subset of individuals selected from a larger group or population to approximate ... Read Full Answer >> 
What is the difference between a simple random sample and a stratified random sample?
Simple random samples and stratified random samples differ in how the sample is drawn from the overall population of data. ... Read Full Answer >> 
What are the advantages and disadvantages of using systematic sampling?
As a statistical sampling method, systematic sampling is simpler and more straightforward than random sampling. It can also ... Read Full Answer >> 
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 >>

Mutual Funds & ETFs
5 Ways To Measure Mutual Fund Risk
These statistical measurements highlight how to mitigate risk and increase rewards. 
Active Trading
Introduction To Stationary And NonStationary Processes
What to know about stationary and nonstationary processes before you try to model or forecast. 
Fundamental Analysis
Scenario Analysis Provides Glimpse Of Portfolio Potential
This statistical method estimates how far a stock might fall in a worstcase scenario. 
Fundamental Analysis
Calculating Future Value
Future value is the value of an asset or cash at a specified date in the future that is equivalent in value to a specified sum today. 
Economics
What is Deadweight Loss?
Mainly used in economics, deadweight loss can be applied to any deficiency caused by an inefficient allocation of resources. 
Investing
The Strong Dollar’s (Real) Toll On Tech Stocks
A large portion of U.S. technology companies’ sales occur overseas, given the strong international business and consumer demand from many U.S. tech firms. 
Fundamental Analysis
How to Calculate a Coverage Ratio
In broad terms, the higher the coverage ratio, the better the ability of the enterprise to fulfill its obligations to its lenders. 
Economics
How to Do a CostBenefit Analysis
The benefits of a given situation or businessrelated action are summed and then the costs associated with taking that action are subtracted. 
Fundamental Analysis
Calculating the HerfindahlHirschman Index (HHI)
The HerfindhalHirschman Index, (HHI) is a measure of market concentration and competition among market participants. 
Fundamental Analysis
Calculating Net Interest Margin
Net interest margin is a metric used to measure the effectiveness of a company’s investment decisions, particularly financial institutions.