KA 2: experimentation: reliability Flashcards

1
Q

what is variation in experimental results due to?

A

the reliability of measurement methods and/or inherent variation in the specimens

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2
Q

how can the reliability of measuring instruments or procedures be determined?

A

repeated measurements or reading of an individual datum point

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3
Q

what does variation indicate?

A

the precision of the measurement instrument or procedure but not necessarily its accuracy

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4
Q

what can the natural variation in the biological material being used be determined by?

A

measuring a sample of individuals from the population

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5
Q

what does the mean of repeated measurements give?

A

an indication of the true value being measured

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6
Q

what is the range of values a measure of?

A

the extent of variation in the results

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7
Q

what does it mean if there is a narrow range?

A

the variation is low

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8
Q

why should independent replication be carried out?

A

to produce independent data sets, which should be compared to determine the reliability of the results

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