Multiple choice

Suppose the true value of a certain length is near 3.678 cm. In one experiment, using a measuring instrument of resolution 0.1 cm, the measured value is found to be 3.5 cm, while in another experiment using a measuring device of resolution, say 0.01 cm, the length is determined to be 3.38 cm. What is the conclusion?

  1. In the first measurement, accuracy is more and precision is less

  2. In the second measurement, accuracy is less and precision is more

  3. In the first measurement, accuracy and precision is more

  4. In the second measurement, accuracy and precision is more

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, this is the correct answer. The first measurement has more accuracy (because it is closer to the true value) and more precision (its resolution is more 0.1 cm), while the second measurement is less accurate and less precise.

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