22_pdfsam_2 - ans = 0.2222 ans = 0.5556 ans = 0.6667 ans...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
ans = 0.2222 ans = 0.5556 ans = 0.6667 ans = -0.6667 Accuracy, Precision, and Errors Accuracy is a measure of the nearness of a value to the correct or true value. Precision refers to the repeatability of a measurement, this how close successive measurements are to each other. Errors: All measurements will have some degree of error. IdentiFable and correctable errors are called systematic . Accidental or other nonidentiFable errors are called random . Systematic Errors: Some errors will always have the same sign (+ or ) and are said to be systematic. Consider measure the distance between two points with a 25m steel tape. ±irst, if the tape is not exactly 25.000m long, compared with the standard at the U.S. Bureau of Standards, there will be a systematic error. However, this error could be removed by applying a correction. A second source of error can be due to the temperature at the time of use and at the time when the tape was compared with the standard. A mathematical correction can be applied if this
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Ask a homework question - tutors are online