Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 1 - Sections 1.1-1.8 - Exercises - Review Questions: 31

Answer

A random error has equal probability of being skewed in either direction (hence random). A systematic error will always lean in one direction, either consistently too high or consistently too low.

Work Step by Step

Random Error: Typically, all measurements are considered to have some degree of random error. This is why sample size is important: if there are many trials, then the measurements will essentially average out. Systematic Error: Systematic error doesn't average out through repeated experiments or trials. If there isn't a balance, then the measurements may systematically read higher than normal or lower than normal.
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