Chemistry Question- accepted values and such?

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pisgahchemist

New member
The are fairly precise because they are all relatively close together. Precision is a way of describing the "reproducibility" in a set of data.

Accuracy is how close the measurements are to the actual value. The mean of the data set is not very close to the accepted value, and so some accuracy is lacking.
 
So, here is the question i'm having difficulty answering:

Sarah and John determined the density of a liquid three times. The values obtained were 2.84g/cm3, 2.85g/cm3, and 2.80 g/cm3. The accepted value is known to be 2.40g/cm3.

a) Are the values determined precise? Explain. b) Are the values accurate? Explain.

Thanks for any help, I really appreciate it:) !
 
The are fairly precise because they are all relatively close together. Precision is a way of describing the "reproducibility" in a set of data.

Accuracy is how close the measurements are to the actual value. The mean of the data set is not very close to the accepted value, and so some accuracy is lacking.
 
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