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2 cards from this section. Quick, good the night before a test.
Define accuracy in your own words.
Think about what you mean when you say a measurement is 'correct'.
What is the detection limit?
Consider how instruments may be limited in sensitivity.
What does 'accuracy' refer to in measurement?
Think of what it means for a measurement to be 'correct'.
True or False: Precision ensures that results are always accurate.
Consider if consistently wrong measurements can be precise.
A water sample is analyzed using two different instruments, yielding the following results: Instrument A measures 2 mg/L, while Instrument B measures 3 mg/L. If the true value is known to be 2.5 mg/L, discuss the accuracy and precision of both results.
Compare how close both instruments are to the true value.
An environmental study requires detection of a toxic substance present at 0.05 mg/L. Instrument C has a detection limit of 0.1 mg/L. Discuss the implications of using this instrument for the study.
Reflect on the importance of instrument sensitivity in environmental assessments.
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