Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

A man whose mass is $75.2\ \text{kg}$ measures his mass three times using a set of weighing scales. The readings he gets are: reading 1 = $80.2\ \text{kg}$, reading 2 = $80.1\ \text{kg}$, reading 3 = $80.2\ \text{kg}$. Which statement best describes the precision and accuracy of the weighing scales?

  • Anot precise to $\pm 0.1\ \text{kg}$ and accurate to $\pm 0.1\ \text{kg}$
  • Bnot precise to $\pm 0.1\ \text{kg}$ and not accurate to $\pm 0.1\ \text{kg}$
  • Cprecise to $\pm 0.1\ \text{kg}$ and accurate to $\pm 0.1\ \text{kg}$
  • Dprecise to $\pm 0.1\ \text{kg}$ and not accurate to $\pm 0.1\ \text{kg}$

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