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A sensitivity coefficient in an uncertainty budget expresses

  • A.how much the result changes for a change in that input
  • B.the sensitivity of the instrument used for that input
  • C.the probability that the input is in error at all
  • D.the calibration interval appropriate to that input

Answer: A

Multiplying each input's uncertainty by its coefficient converts them all into the units of the result so that they can be combined. An input the result barely depends on can be measured crudely, which is often where the effort is best saved.

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