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sampling variability and improper calibration of an instrument.

--Actually, improper calibration of an instrument would be a systematic error, as it would always be in the same direction and by the same amount.

--Random errors are unknown, unpredictable changes in the instruments or the environment. For example, the temperature of the room changed, or the doors of a balance were left open.

--Random errors are things that can be corrected for (mostly) by repeating the experiment or averaging the current results.

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Related Questions

What is the difference between a bias and a random error?

Bias is systematic error. Random error is not.


How do you overcome or reduce the problem of random error and systematic error while doing an experiment?

how to reduce the problem of random error and systematic error while doing an experiment


Can increasing sample size reduce random error?

Random error and sample size have an inverse relationship...As sample size INCREASES random error DECREASES. There's a good explanation at the related link.


What is a stochastic error term?

A stochastic error indicates an error that is random between measurements. Stochastics typically occur through the sum of many random errors.


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Random errors can be parallax and from changes in the environment.


Is random error a form of bias?

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Systemic or precisely Systematic Error in a reading taken by an instrument occurs due to the parts installed in it. Random error occurs when we get a number of repetitive readings during the same experiment because of human error. Perfect example for random is "Parallax Method".


How are the personal error and random error minimized?

Personal error can be minimized by providing proper training and clear guidelines to the individuals involved. Random error can be minimized by increasing sample size, repeating experiments, and using precise measurement tools.


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The only way to minimize random error is to repeat the experiment more times to get a better average. This means your result is accurate but not percise


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