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The most common cause of disagreement between two laboratories measuring the same sample is

  • A.the brand of paper used to record the results
  • B.the season of the year in which the measurements are taken
  • C.differences in geometry, presentation or ultraviolet setting
  • D.the age of the two operators concerned

Answer: C

These conditions change the physical measurement rather than merely its interpretation. Agreeing them in advance removes most of the disagreement. These conditions change the physical measurement. Agreement in advance prevents the dispute.

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