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Uncertainties |
Uncertainty is a term
used in subtly different ways in a number of fields, including philosophy, physics, statistics, economics,
finance, insurance, psychology, sociology, engineering, and information science. It applies to predictions of
future events, to physical measurements already made, or to the unknown. - Wikipedia Although the terms
[uncertainty and risk] are used in various ways among the general public, many specialists in decision theory,
statistics and other quantitative fields have defined uncertainty and risk more specifically. Doug Hubbard defines
uncertainty and risk as:
- Uncertainty: The lack of certainty, A state of having limited knowledge where it is impossible to exactly
describe existing state or future outcome, more than one possible outcome.
- Measurement of Uncertainty: A set of possible states or outcomes where probabilities are assigned to each
possible state or outcome - this also includes the application of a probability density function to continuous
variables.
- Risk: A state of uncertainty where some possible outcomes have an undesired effect or significant loss.
- Measurement of Risk: A set of measured uncertainties where some possible outcomes are losses, and the
magnitudes of those losses - this also includes loss functions over continuous variables.
Apply these rules for calculating uncertainties:
If with measured uncertainties then
If the uncertainties are independent and
random, then: |
If with measured uncertainties then
If the uncertainties are independent and
random, then: |
where the measured value of x = x ± dx |
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Copyright: 1996 - 2024
Webmaster:
Kirt
Blattenberger,
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
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design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
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All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.
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