Cause of systematic errors - Metrology & Quality Control

Q.  Which of the following statements is/are true?

1. Gross errors are known as compensating errors
2. Systematic errors are caused due to system interaction errors
3. Probability laws are followed by systematic errors
- Published on 07 Aug 15

a. Only 1
b. Only 2
c. Only 3
d. All of the above

ANSWER: Only 2

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    Discussion

  • Sravanthi   -Posted on 12 Oct 15
    Random errors are called as compensating errors. Error signs of these errors may be positive or negative hence these errors may cancel each other. Overall effect of random errors is much lower. Laws of probability are followed by random errors and are handled by statistical analysis of test data.

    Systematic errors have same sign and these errors add up to a cumulative value. Hence systematic errors are called as cumulative errors. Overall effect of systematic errors is large on measured quantity as these errors add up.

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