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March 29, 2024, 01:37:22 pm

Author Topic: Systematic and random error  (Read 3665 times)  Share 

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VCE_2012

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Systematic and random error
« on: March 05, 2012, 09:20:51 pm »
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Can someone define and explain the difference of Systematic and random error and give a couple of examples.

Thanks in advanced

Reckoner

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Re: Systematic and random error
« Reply #1 on: March 05, 2012, 09:49:08 pm »
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A systematic error is an error that will be the same every time you do a trial and will effect all measurements. For example the pipette was not calibrated correctly in a titration, so 18ml was transferred not 20ml. A random error is trial specific, like overshooting the end point, or misreading the burette. If you repeat an experiment lots of times and take an average, you should get rid of most random error, while the systematic error stays because it was constant in each trial.   

VCE_2012

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Re: Systematic and random error
« Reply #2 on: March 05, 2012, 10:08:09 pm »
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A systematic error is an error that will be the same every time you do a trial and will effect all measurements. For example the pipette was not calibrated correctly in a titration, so 18ml was transferred not 20ml. A random error is trial specific, like overshooting the end point, or misreading the burette. If you repeat an experiment lots of times and take an average, you should get rid of most random error, while the systematic error stays because it was constant in each trial.   
Thanks for that, it really helped.