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.

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 ...

What are some of the more common types of regressions investors can use?
The most common types of regression an investor can use are linear regressions and multiple linear regressions. Regressions ... Read Full Answer >> 
What types of assets produce negative portfolio variance?
Assets that have a negative correlation with each other produce negative portfolio variance. Variance is one measure of the ... Read Full Answer >> 
When is it better to use systematic over simple random sampling?
Under simple random sampling, a sample of items is chosen randomly from a population, and each item has an equal probability ... Read Full Answer >> 
What are some common financial sampling methods?
There are two areas in finance where sampling is very important: hypothesis testing and auditing. The type of sampling methods ... Read Full Answer >> 
How can I measure portfolio variance?
Portfolio variance measures the dispersion of returns of a portfolio. It is calculated using the standard deviation of each ... Read Full Answer >> 
How do you calculate GDP with the income approach?
The income approach to measuring gross domestic product (GDP) is based on the accounting reality that all expenditures in ... Read Full Answer >>

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. 
Economics
Explaining the Liquidity Coverage Ratio
The liquidity coverage ratio requires banks and other financial institutions to hold enough cash and liquid assets on hand to weather market stress. 
Fundamental Analysis
Calculating Valuation
Valuation is the process of determining what an asset is worth. 
Economics
Will the Selloff in China Hurt the Global Economy?
Though China is the world’s second largest economy, its volatility in the stock market is unlikely to have an impact on the global or Chinese economy. 
Fundamental Analysis
Understanding Qualitative Analysis
Qualitative analysis is a general term describing the nonmathematical scrutiny used by investors and managers to make investment and business decisions.