Hello all,
I have just been introduced to the idea of SIP math. I am a statistician in the business world and thus would like to learn more. I had a question perhaps some one could point me in the right direction. I would like to update a SIP with real data. That is I would like to replace some of my simulated data with observed data. I am trying to find a source to prove what I want to do is mathematically sound, and how I would choose which simulated observations to switch out with the real data. Was just wondering if anyone has done something like this or would know where to look for how to validate a technique like this.
Thank you

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SIPmath Meteorology

"To get a better sense of whether or not the severe storms' lack of landfall was an outlier or not, they looked at historical records and ran computer simulations of hurricane seasons from 1950 to 2002. They ran the simulations 1,000 times and estimated that a 9-year stretch like this is likely to occur only once in about 177 years."

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Simpson's Paradox --a simple description.

A SIP is a unit simulator. Trial number in, data out.

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SIPmath 2.0 Standard from ProbabilityManagement.org

ProbabilityManagement.org's open SIPmath 2.0 standard links together risk models in Excel, Crystal Ball,@RISK, Risk Solver, XLSim and many other environments. 

Free tools for creating interactive simulation models in Excel, models that don't need macros or add-ins to run, are available from our web site. These can be especially useful to Crystal Ball and @Risk users; they can get interactivity by running their models into an interactive SIPmath environment.

For more information, visit

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A good Article by David Vose explaining some of the hazards of calculating uncertainty without SIP math.

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SIP math vs Monte Carlo

This is a topic that should get more attention.

#probabilitymanagement   #montecarlo   #simulation  

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DistShaper6 does standard SIPs in XML

I've upgraded DistShaper to put out the proposed XML standard for SIPs. See http://smpro.ca/pjs/distshaper .
Use the "CSV coded SIP" format.

Red Word Translator

In The Flaw of Averages, Sam introduced the idea of Red Words. I think it would be useful to extend that tradition in the context of SIPs and SIP math. Feel free to post corrections and additions.

Conditional Probability Distribution
A filtered SLURP using the sample values of one of the included SIPs to provide the filter. Conventionally, that's
F(i) = (a < SIPx(i) < b)
but it can be any boolean function.

Continuous Random Variable
Discrete Random Variable - computers don't do continuous.

Scatterplot of two SIPs.

Cumulative Distribution Function
A SIP's percentile curve. A plot of value vs rank.

Discrete Random Variable
An uncertain variable or SIP.

Joint Probability Distribution
The SIP result of a calculation with two or more SIPs

Joint Probability Function
Arithmetic - The SIP math used to calculate with two or more SIPs.

Probability Density Function
A histogram of a SIP. A SIP's Shape.

Probability of X
The fraction of a SIP's elements for which X is true.

Taking a richly-detailed SIP and replacing it with a featureless line.

Standard Deviation
Not defined for most SIPs

Utility Theory
Risk Attitude. Do you feel lucky?

The square of not defined for most SIPs

Uncertain Variable. Usage is restricted to people with PhDs.

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SIPmath and the Art of the SIP
Monte Carlo Simulation without the 'Monte Carlo'. A must-read article by Sam Savage.

#sipmath   #probmgt   #simulation  
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