![]() True values are often unknown, and under these situations, standard deviation is one way to represent the error. The equations above are based on the assumption that true values are known. Refer to the equations below for clarification. The absolute error is then divided by the true value, resulting in the relative error, which is multiplied by 100 to obtain the percentage error. The computation of percentage error involves the use of the absolute error, which is simply the difference between the observed and the true value. Regardless, in cases such as these, it can be valuable to calculate the percentage error. Error can arise due to many different reasons that are often related to human error, but can also be due to estimations and limitations of devices used in the measurement. ![]() When measuring data, the result often varies from the true value. Percentage error is a measurement of the discrepancy between an observed and a true, or accepted value. Related Percentage Calculator | Scientific Calculator | Statistics Calculator
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