Types of Errors in Measurements
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Questions and Answers

What is precision in the context of measurements?

  • The occurrence of predictable errors
  • The unpredictability of errors due to poor precision
  • The measure of dispersion of values around the mean
  • The closeness of measured results to each other (correct)
  • Which term best describes errors that occur predictably once a pattern is established?

  • Random error
  • Standard deviation
  • Systematic error (correct)
  • Coefficient of variation
  • What does the coefficient of variation represent?

  • SD divided by mean expressed as a percentage (correct)
  • Dispersion of values around the mean
  • Precision of measurements
  • Predictable errors of the same magnitude
  • Which type of error occurs due to poor precision and is unpredictable?

    <p>Random error</p> Signup and view all the answers

    In statistical terms, what does standard deviation measure?

    <p>Dispersion of values around the mean</p> Signup and view all the answers

    Which term refers to the measure of dispersion of a group of values around the mean?

    <p>Standard deviation</p> Signup and view all the answers

    What type of error occurs predictably once a pattern is established?

    <p>Systematic error</p> Signup and view all the answers

    Which parameter is calculated as the standard deviation divided by the mean expressed as a percentage?

    <p>Coefficient of variation</p> Signup and view all the answers

    What characterizes an error that occurs unpredictably due to poor precision?

    <p>Systematic error</p> Signup and view all the answers

    In the context of measurements, what does precision refer to?

    <p>Reproducibility and repeatability of measured results</p> Signup and view all the answers

    Study Notes

    Sources of Error

    • Systematic error: occurs predictably once a pattern of recognition is established; predictable errors of the same sign and magnitude.
    • Random error: occurs unpredictably due to poor precision.

    Measurement Precision

    • Precision refers to repeatability; reproducibility, which is how closely measured results compare with each other.
    • Coefficient of variation is the standard deviation (SD) divided by the mean, expressed as a percentage.

    Statistics

    • Standard deviation (SD) is the measure of dispersion of a group of values around the mean.

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    Description

    Test your knowledge on the different types of errors in measurements, including precision, systematic error, and random error. Understand how each type of error impacts the accuracy of measured results.

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