Chemistry AS portfolio
Saturday, 9 October 2010
Reliability, Precision, Accuracy and Validity
What is it?
How can it be applied in an experiment?
Others can repeat your experiment and get the same reulsts.
This can be attained by repeating the experiment.
How small a measurement is.
This can be attained by using measuring instruments of a smaller scale, e.g. Vernier Calliper vs. Ruler.
How close a measurement is to the true value.
This can be attained by reducing all errors.
You can only make a conclusion if your measurement if your measurement have been affected by an independent variable.
This can be attained by carrying out a fair test.
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