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, ... 
Sample
A subset containing the characteristics of a larger population. ... 
Normal Distribution
A probability distribution that plots all of its values in a ... 
Probability Distribution
A statistical function that describes all the possible values ... 
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 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. 
Fundamental Analysis
What is a Null Hypothesis?
In statistics, a null hypothesis is assumed true until proven otherwise. 
Investing
How to Use Stratified Random Sampling
Stratified random sampling is a technique best used with a sample population easily broken into distinct subgroups. Samples are then taken from each subgroup based on the ratio of the subgroup’s ... 
Fundamental Analysis
Lognormal and Normal Distribution
When and why do you use lognormal distribution or normal distribution for analyzing securities? Lognormal for stocks, normal for portfolio returns. 
Investing Basics
Using Normal Distribution Formula To Optimize Your Portfolio
Normal or bell curve distribution can be used in portfolio theory to help portfolio managers maximize return and minimize risk.