DEFINITION of 'Frequency Of Exclusion '
Frequency of exclusion refers to the rate of occurrences where a group is excluded from a sample or study. The frequency of exclusion would attempt to define the percentage or rate that a specified group is underrepresented in a sample or study. Statistical study results lose their meaningfulness if the sample group does not accurately represent the entire population of interest.
INVESTOPEDIA EXPLAINS 'Frequency Of Exclusion '
For example, one could determine the rate at which persons with a certain blood type are excluded from a particular medical study. If a certain blood group is not properly represented in the research study, then the effects of a tested drug will not reflect the actual results that will occur when the drug hits the market.
RELATED TERMS

Feasibility Study
An analysis of the ability to complete a project successfully, ... 
Probability Distribution
A statistical function that describes all the possible values ... 
Sample
A subset containing the characteristics of a larger population. ... 
Normal Distribution
A probability distribution that plots all of its values in a ... 
Absolute Frequency
A statistical term describing the total number of trials or observations ... 
Monopoly
A situation in which a single company or group owns all or nearly ...
RELATED FAQS

What is a "linear" exposure in Value at Risk (VaR) calculation?
A linear exposure in the valueatrisk, or VaR, calculation is represented by positions in stocks, bonds, commodities or ... Read Full Answer >> 
What is the criteria for a simple random sample?
Simple random sampling is the most basic form of sampling and can be a component of more precise, more complex sampling methods. ... Read Full Answer >> 
What are some examples of ways that sensitivity analysis can be used?
Sensitivity analysis is an analysis method that is used to identify how much variations in the input values for a given variable ... Read Full Answer >> 
How is the 8020 rule (Pareto's Principle) used in macroeconomics?
The 8020 rule was first used in macroeconomics to describe the distribution of wealth in Italy in the early 20th century, ... Read Full Answer >> 
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 >>
Related Articles

Investing Basics
What Are The Odds Of Scoring A Winning Trade?
Just because you're on a winning streak doesn't mean you're a skilled trader. Find out why. 
Active Trading Fundamentals
Bet Smarter With The Monte Carlo Simulation
This technique can reduce uncertainty in estimating future outcomes. 
Active Trading Fundamentals
How To Convert Value At Risk To Different Time Periods
Volatility is not the only way to measure risk. Learn about the "new science of risk management". 
Options & Futures
Multivariate Models: The Monte Carlo Analysis
This decisionmaking tool integrates the idea that every decision has an impact on overall risk. 
Fundamental Analysis
Monte Carlo Simulation With GBM
Learn to predict future events through a series of random trials. 
Fundamental Analysis
Scenario Analysis Provides Glimpse Of Portfolio Potential
This statistical method estimates how far a stock might fall in a worstcase scenario. 
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. 
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.