CHEM1001 Lecture 22: Chem 22
Document Summary
Reproducibility - the variation arising using the same measurement process among different instruments and operators, and over longer time periods. All measurements are subject to error, which contributes to the uncertainty of the result. Errors can be classified as human error or technical error. Perhaps you are transferring a small volume from one tube to another and you don"t quite get the full amount into the second tube because you spilled it: this is human error. Technical error can be broken down into two categories: random error and systematic error. Random error, as the name implies, occur periodically, with no recognizable pattern. Systematic error occurs when there is a problem with the instrument. A scale could be improperly calibrated and read 0. 5 g with nothing on it. All measurements would therefore be overestimated by 0. 5 g. unless you account for this in your measurement, your measurement will contain some error.
