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View Poll Results: Which represents variance?
Variance = E[(X-E[X])^2] = E[X^2] - E[X]^2 62 58.49%
Variance = Amount this month - Amount last month 5 4.72%
Both of the above 31 29.25%
Variance = E[42] 8 7.55%
Voters: 106. You may not vote on this poll

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  #41  
Old 12-28-2016, 09:37 PM
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Originally Posted by snakeroberts View Post
grrr
there are many models of set theory. Model theorists tend to be open minded (see skolem paradox)
Yes, there are countable models of the real numbers. Why does this bother you? True, in those models you can show that the reals themselves are uncountable, but so what? Perhaps you aren't comfortable with the notion of a model.
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  #42  
Old 12-29-2016, 12:30 PM
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Originally Posted by lifeact91 View Post
I used the term "variance" to describe volatility in claim results once, using the E[X^2] - E[X]^2 definition. I was just starting out in my job, and I didn't realize that all of management thought of "variance" as "Amount this quarter - Amount last quarter".

Much confusion was had by all.
In fairness I much prefer to use standard deviation when giving a sense of volatility since the absolute number is more directly meaningful.
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  #43  
Old 12-29-2016, 12:39 PM
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In fairness I much prefer to use standard deviation when giving a sense of volatility since the absolute number is more directly meaningful.
That's what I was thinking. Only the people building models really care about statistical variance.
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  #44  
Old 12-29-2016, 12:43 PM
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I feel like the meaning is slightly different.
My comment about minds not changing was implicitly referring to the topic under discussion. Of course I didn't mean they would never change, just that continuing to argue would not increase the likelihood of change. By contrast, saying that minds are invariant seems to say they don't change on any topic.

But I still like the idea of some invariant measure of people's minds. That aspect will continue to interest me, even if not related to this thread topic.
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My latest favorite quotes, updated Jan 13, 2017.

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JMO is right
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I agree with JMO.
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Don't live your life by other people's expectations.
Note that DTNF doesn't use red font, but it ought to be obvious anyway.
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Yes, it must be a vast conspiracy.
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"It seems" isn't really compelling for me.
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  #45  
Old 12-29-2016, 04:53 PM
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In fairness I much prefer to use standard deviation when giving a sense of volatility since the absolute number is more directly meaningful.
That's true. I was young, dumb, and full of textbook learnin'.
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  #46  
Old 01-11-2017, 02:38 PM
snakeroberts snakeroberts is offline
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Originally Posted by Colymbosathon ecplecticos View Post
Yes, there are countable models of the real numbers. Why does this bother you? True, in those models you can show that the reals themselves are uncountable, but so what? Perhaps you aren't comfortable with the notion of a model.


I just got around to reading this.
I posted this as a joke. I dont know how you read "arent comfortable" into what I wrote. Perhaps your not comfortable regarding Human emotion.

In addition I dont need your validation or lack thereof regarding my knowledge of "model theory" thank you very much. Please continue making your snarky comments in the exam section so you can feel superior.
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  #47  
Old 01-12-2017, 08:52 PM
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