How Do You Calculate Relative Error?

Answer

To calculate relative error of an object, for example a desk, you measure the whole length by using a long measuring tape, a pen and paper. The absolute error of a 30centimeters desk will be 5centimeters. The smallest unit marked on the meter stick is 2 centimeters so that your measurement is accurate to within absolute error of 2 centimeters, divide the absolute error by the real measurement of the desk. The relative error is then computed by dividing the absolute error by the true value.
Q&A Related to "How Do You Calculate Relative Error?"
1. To begin, a measurement has to take place: counting the money in a coin jar, measuring the length of a desk, so on and so forth. After determining what needs to be measured, the
http://www.ehow.com/how_4425529_calculate-relative...
1. Calculate the absolute error in one of two ways: First method: Subtract the experimental value you got with your own measurements from the actual, or "real" measurement
http://www.wikihow.com/Calculate-Relative-Error
to ensure your experiment is precise and to prevent error to happen during experiment.
http://wiki.answers.com/Q/Why_do_you_need_to_calcu...
I bet you did not notice that there is an absolute value. symbol around the difference. |measured value - actual value|. You may do it either way then if you get a negative answer
http://answers.yahoo.com/question/index?qid=201306...
2 Additional Answers
Ask.com Answer for: how do you calculate relative error
How to Calculate Relative Error
Relative error is a number that compares how incorrect a quantity is from a number considered to be true. Unlike absolute error, where the error has the units of what is being measured, relative error is expressed as a percentage, defined as the absolute... More »
Difficulty: Easy
Source: www.ehow.com
To calculate relative error you will first need to know the experimental value and the real value. Once you know these numbers, divide the experimental value by the real value, and then divide the answer you get by the real number to get the percentage. You can find more information here: http://www.tvlesson.com/video/20198_how-to-calculate-relative-error.html
Explore this Topic
The relative error formula is written as Erel=|x-x*| /|x|. The formula has various variables. X is the proper value and X* is used to represent the approximate ...
To calculate relative average deviation, first find the average of the measurements recorded. With the new average, subtract that value from each of the measurements ...
This is calculated by the simple mathematical relationship of subtraction. You simply calculate range and subtract the minimum value from the maximum value. ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com