A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 4.11 g/mL, 4.81 g/mL, 4.95 g/mL, 3.75 g/mL. If the actual value for the density of the sugar solution is 4.75 g/mL, which statement below best describes her results?

a. Her results are both precise and accurate

b. Her results are precise, but not accurate.

c. Her results are neither precise nor accurate.

d. Her results are accurate, but not precise.

e. It isn't possible to determine with the information given.

Question

Nestle

Chemistry

28 May, 00:16

A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 4.11 g/mL, 4.81 g/mL, 4.95 g/mL, 3.75 g/mL. If the actual value for the density of the sugar solution is 4.75 g/mL, which statement below best describes her results?

a. Her results are both precise and accurate

b. Her results are precise, but not accurate.

c. Her results are neither precise nor accurate.

d. Her results are accurate, but not precise.

e. It isn't possible to determine with the information given.

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Answers (1)

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Jason Mason · Answer 1

D. Her result are accurate, but not precise.

Explanation:

Accuracy is how close a measurement is to the correct value for that measurement. The precision of a measurement system is refers to how close the agreement is between repeated measurements (which are repeated under the same conditions).

On on her result, The mean of her result (4.11+4.81+4.95+3.75 = 4.41) is close to the actual value (4.75) but none of her measured value are close to each other; this is an example of accuracy without precision.