Worksheet: Measurement Accuracy and Precision

In this worksheet, we will practice defining measurement accuracy and precision and explaining different types of measurement errors that affect them.

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(C)
  • B(B)
  • C(D)
  • D(A)

Which set of hits is neither accurate nor precise?

  • A(C)
  • B(B)
  • C(A)
  • D(D)

Which set of hits is accurate but not precise?

  • A(C)
  • B(A)
  • C(B)
  • D(D)

Which set of hits is precise but not accurate?

  • A(B)
  • B(D)
  • C(A)
  • 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 precision.
  • 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 accuracy.

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 precision.
  • 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 accuracy.

Q4:

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

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

Q5:

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

  • AA precise measurement is more accurate than an accurate measurement.
  • 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.
  • DThe 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.

Q6:

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

  • AAn accurate measurement has a value that is the same value when a quantity is repeatedly measured.
  • 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.
  • DThe more accurate the measurement of a quantity is, the closer the measured value is to the actual value of the measured quantity.

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