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As
you do your experiment, you need to watch out for the
following types of errors or mistakes:
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1. Errors
in the measuring instruments that you are using.
Because this type of error will always produce a measurement
that is higher or lower than the "true" value, it is
called random error.
2. Systematic
errors (also known as non-random errors), which are
due to factors which bias the result in one direction.
No measurement, and therefore no experiment, can be
precisely accurate. At the same time, in science we
have standard ways of estimating, and in some cases,
reducing errors.
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Therefore, it is important to determine the
accuracy of a measurement. And, when stating your results, you must
state what the measurement error is. Actually, for scientists, a
measurement without a stated error is meaningless!
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