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Lesson: Measurement Accuracy and Precision

Sample Question Videos

Worksheet • 6 Questions • 1 Video

Q1:

The diagram shows a target board and four sets of hits on it, (A), (B), (C), and (D). The shots were all aimed at the bull’s-eye of the target.

Which set of hits is both accurate and precise?

  • A(A)
  • B(B)
  • C(D)
  • D(C)

Which set of hits is neither accurate nor precise?

  • A(D)
  • B(A)
  • C(C)
  • D(B)

Which set of hits is accurate but not precise?

  • A(C)
  • B(A)
  • C(D)
  • D(B)

Which set of hits is precise but not accurate?

  • A(B)
  • B(A)
  • C(D)
  • D(C)

Q2:

Which of the following statements most correctly describes how zero measurement errors affect the accuracy and the precision of measurements?

  • AZero errors decrease measurement accuracy.
  • BZero errors decrease both the accuracy and the precision of measurements.
  • CZero errors do not affect measurement accuracy or measurement precision.
  • DZero errors decrease measurement precision.

Q3:

Which of the following statements most correctly describes how systematic measurement errors affect the accuracy and the precision of measurements?

  • ASystematic errors decrease measurement accuracy.
  • BSystematic errors decrease both the accuracy and the precision of measurements.
  • CSystematic errors do not affect measurement accuracy or measurement precision.
  • DSystematic errors decrease measurement precision.

Q4:

Which of the following statements most correctly describes how random measurement errors affect the accuracy and the precision of measurements?

  • ARandom errors decrease both the accuracy and the precision of measurements.
  • BRandom errors decrease measurement accuracy.
  • CRandom errors do not affect measurement accuracy or measurement precision.
  • DRandom errors decrease measurement precision.

Q5:

Which of the following statements most correctly describes the meaning of the precision of measurements?

  • AThe more precise the measurement of a quantity is, the smaller the predictable change that can be made between the measured value and other measured values of the same quantity.
  • BThe more precise the measurement of a quantity is, the closer the measured value is to the actual value of the measured quantity.
  • CA precise measurement is made using a correct measurement method.
  • DA precise measurement is more accurate than an accurate measurement.

Q6:

Which of the following statements most correctly describes the meaning of the accuracy of measurements?

  • AThe more accurate the measurement of a quantity is, the closer the measured value is to the actual value of the measured quantity.
  • BThe more accurate the measurement of a quantity is, the smaller the predictable change that can be made between the measured value and other measured values of the same quantity.
  • CAn accurate measurement is made using a correct measurement method.
  • DAn accurate measurement has a value that is the same value when a quantity is repeatedly measured.
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