Hello, I need help, which of the following represent valid probibility values?

0

100%

-0.8

0.001

thanks again

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- Jul 8th 2007, 04:29 PMmkcarprobability values
Hello, I need help, which of the following represent valid probibility values?

0

100%

-0.8

0.001

thanks again - Jul 8th 2007, 04:34 PMJhevon
when written in terms of a decimal, a valid probability value, call it P, ranges from $\displaystyle 0 \leq P \leq 1$

when written as a percentage: 0 % $\displaystyle \leq P \leq $ 100%

Note: when an event is certain, it has a probability of 1 or 100%, when an event is impossible, it has a probability of 0 - Jul 8th 2007, 09:49 PMCaptainBlack
- Jul 9th 2007, 02:55 AMrualin
How? By subjective probability from intuition, guesses, and estimates?

- Jul 9th 2007, 03:43 AMCaptainBlack
- Jul 9th 2007, 03:45 AMrualin
- Jul 9th 2007, 03:56 AMCaptainBlack
Suppose the lengths of rods are distributed normaly with mean mu and sd sigma.

Then it is possible for a rod to have length mu+signa/3, but the probability that it does is zero.

This is a toy construction but there are real cases where this can be important (fractal noise

comes to mind).

RonL