Posted by **Physics** on Saturday, June 20, 2009 at 9:06pm.

when trying to find uncertanty percent error and your given the number - 15 s^-2 m with a implied uncertanty of +/- 1 s^-2 m and you try to find the percent uncertanty and you do this

(- 15 s^2 m)^-1 1 s^-2 m (100 %) is the percent negative or positve

also when trying to find the average percent uncertanty of your data do you count that number as positive or negetive when you find the average by finding the mean?

- Physics -
**drwls**, Sunday, June 21, 2009 at 2:12am
In the example you mentioned, the relative uncertainty is +/- 1/15 = +/- 6.7%

I am not sure what you mean by your second question. When you make a series of measurements of something that should be a constant, the most probable value is the mean, unless there are systematic bias errors. Errors due to nonrepeatability are expressed as +/- about the mean in most cases. The error value can be estimated from the standard deviation, which is the square root of the average squared deviation from the mean.

## Answer This Question

## Related Questions

- College Physics - If the uncertanty in the slope is 1.214×10-14, is the measured...
- the percent equation - 1. find 30% 0f 70 2 what is 80% of 65 3 what percent of ...
- Propagating error - Find the absolute and percent relative error for each calc. ...
- Chemistry - To calculate the percent error you would use the error in ...
- alg 1 - Find the percent error in calculating the volume of the prism. V=(bw)(h...
- math - A bond has an average return of 6.8 percent and a standard deviation of 4...
- Percent error math - Julian's measurement was 105 percent of 50 pounds and ...
- Earth Science - A student finds the density of an ice cube to be 0.80g/cm3; it ...
- Chemistry - Do you need to do uncertainties on percent error? It doesn't make ...
- MATH - Find the interest earned by an account with $1,200 of simple interest of ...

More Related Questions