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Month: December 2009

Dr. De Mars General Life Ramblings

Knowing what we don’t know

ByAnnMaria De Mars December 28, 2009

I knew it! I am finally getting some time to finish reading The Black Swan and I came across this statement, “Makridakis and Hibon reached the sad conclusion that ‘statistically sophisticated or complex methods do not necessarily provide more accurate forecasts than simpler ones’. ” I have thought this for years. Like most of my…

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statistics

Multiple imputation, seriously now

ByAnnMaria De Mars December 17, 2009December 17, 2009

A few days ago I gave an example of multiple imputation but I glossed over a number of things, which is fine when you are just getting into a topic, or when the mad scientist part of your personality has taken over, but seriously now … Our story continues … when last seen, our data…

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Dr. De Mars General Life Ramblings

Multiple Imputations for Missing Data – uh, maybe

ByAnnMaria De Mars December 3, 2009December 15, 2009

(Or: Why a computer will not be replacing me any time soon) [Originally, the second half of this was supposed to be an explanation of the real use of multiple imputation which is in estimating parameters but then my daughter came to pick me up early and I got the flu so I am now…

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