Asking about Scientific uncertainty......

[albertlee]

In Science, Do we deal with uncertainty only when the numbers we get are from the measuring we take? or there is other situation where we need to deal with uncertainty, in which has a limit of accuracy?

 

Albert

[5614]

think of some of the universe theories - how it started, how it will end - all uncertain

[albertlee]

Ok, so the most cases dealing with uncertainty are in the situation where the numbers come from the measuring, right?

 

Albert

[YT2095]

Science deals with most ALL phenomenon, explainable or otherwise. it`s "job" if you like is to try an explain so to speak, or Quantify and Qualify these in terms that are repeatable and will produce similar to exact results upon repetition, regardless of personal beleif/incredulity.

 

it is true that a "phenomenon" maybe proven valid under these conditions, but also exist without explaination.

 

that is NOT a limitation of Science, but simply a PART of it

[swansont]

There's random statistical uncertainty as well. You collect a range of data for some measurement. While each one may have a very small measurement uncertainty, the standard deviation may be larger. This gets smaller with the sqare root of the number of dsata points, so the answer is to take a lot of data.

 

Add to that systematics, which are not random, and so don't average out.

[JHAQ]

Uncertainty applies to many things . Consider all the equations which deal with macroscopic uncertainties . Bayes Theorem , Binomial Equation & Poisson Distribution----

[albertlee]

Well JHAQ, what i mean is the scientific uncertainty which means there is a range when you take the measuring, which the true value will be in it...... for eg, when you say you weigh 75 kg, but it will not be just exactly 75kg, and there is a scale depending on how accurate your balance is, so I will say it is: 74kg < your mass < 76kg

and there is a limit of accuracy... Since there is rarely anything in science that we can say exactly true value on measuring, we are just trying to be as accurate as possible.

 

For JHAQ's post, there is only few choices for the mathematical uncertainty, for eg, the binomial equation, (a-1)(a+1) = 0, then a shall be either -1 or 1, and therefore there is only 2 possbilities..

 

Any more comment?