DEFINITION of 'Empirical Probability'
A form of probability that is based on some event occurring, which is calculated using collected empirical evidence. An empirical probability is closely related to the relative frequency in a given probability distribution.
INVESTOPEDIA EXPLAINS 'Empirical Probability'
In order for a theory to be proved or disproved, empirical evidence must be collected. An empirical study will be performed using actual market data. For example, many empirical studies have been conducted on the capital asset pricing model (CAPM), and the results are slightly mixed.
In some analyses, the model does hold in real world situations, but most studies have disproved the model for projecting returns. Although the model is not completely valid, that is not to say there is no utility associated with using the CAPM. For instance, the CAPM is often used to estimate a company's weighted average cost of capital.

Probability Distribution
A statistical function that describes all the possible values ... 
Modern Portfolio Theory  MPT
A theory on how riskaverse investors can construct portfolios ... 
Mutual Fund Theorem
An investing theory, postulated by Nobel laureate James Tobin, ... 
Capital Asset Pricing Model  CAPM
A model that describes the relationship between risk and expected ... 
Beta
A measure of the volatility, or systematic risk, of a security ... 
A Priori Probability
Probability calculated by logically examining existing information. ...

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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 >> 
How do you calculate variance in Excel?
To calculate statistical variance in Microsoft Excel, use the builtin Excel function VAR. Given a set of numbers value1 ... Read Full Answer >> 
How do I discount Free Cash Flow to the Firm (FCFF)?
Discounted free cash flow for the firm (FCFF) should be equal to all of the cash inflows and outflows, adjusted to present ... Read Full Answer >>

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