Types of Errors and Bias in Measurements
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Questions and Answers

What type of errors are indeterminate or random errors?

  • Errors that do not affect precision
  • Errors caused by specific variables
  • Errors that are determined and controlled
  • Errors that affect precision (correct)
  • Which of the following is an example of a random error?

  • Wrong test performed due to mislabeling
  • Incorrect patient ID error
  • Contaminated samples due to poor technique
  • Presence of bubbles in one of the trials (correct)
  • What do random errors result from?

  • Many small, uncontrollable variables and personal judgments (correct)
  • Specific, predictable variables
  • Controlled variables
  • Large, controllable factors
  • Which of the following is NOT mentioned as a type of personal error in the medical laboratory?

    <p>Late reports</p> Signup and view all the answers

    How do random errors influence a measured value?

    <p>Decrease precision</p> Signup and view all the answers

    What is the main characteristic of systematic errors?

    <p>They have an assignable cause</p> Signup and view all the answers

    Which term is used to measure the systematic error associated with an analysis?

    <p>Bias</p> Signup and view all the answers

    What is the sign of bias if it causes the results to be low?

    <p>Negative</p> Signup and view all the answers

    What causes instrumental errors in analytical chemistry?

    <p>Nonideal instrument behavior</p> Signup and view all the answers

    Which type of error arises from the personal limitations of the experimenter?

    <p>Personal Errors</p> Signup and view all the answers

    In analytical chemistry, what can cause a weight to be less than the correct one in the gravimetric method?

    <p>Insufficient insolubility of precipitate</p> Signup and view all the answers

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