Based on the experience of the responder, to
correctly calculate measurements in real-world. Firstly is to avoid errors as
much as possible. Errors are what makes your measurement invalid and
unreliable. There are two types of error which is called the systematic error
and the random error. Each error has different sources. Words that were
mentioned –invalid and unreliable are very important key aspects to determine
that your measure is truly accurate and consistent. Some would recommend using
the mean method, doing three trials in measuring and getting their mean, in
response to this problem.
