A rod's true length is 50.0 cm. Four students measure it five times each. Which set is both accurate and precise?

  1. 50.1, 49.9, 50.0, 50.1, 49.9 cm
  2. 52.1, 52.2, 52.1, 52.0, 52.1 cm
  3. 47.0, 53.5, 49.0, 51.8, 48.6 cm
  4. 45.2, 55.0, 52.3, 47.9, 54.1 cm
Answer

A) 50.1, 49.9, 50.0, 50.1, 49.9 cm

The values are close to each other (precise) and their mean is close to 50.0 cm (accurate). SLO P-11-A-05 · Application

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