A person tries to pour exactly one kilogram of sand onto a scale on five

different occasions. The actual amounts he pours are shown below:

0.80 kg, 0.90 kg, 1.0 kg, 1.1 kg, 1.2 kg

Which of the following best describes his results?

A. While inconsistent, his average of 1.0 kg made his results quite

accurate

O

B. His results were very consistent.

O

C. His results were both precise and accurate.

O

D. His results were very precise.

Question

Chemistry

Cecelia Ashley

15 July, 16:15

A person tries to pour exactly one kilogram of sand onto a scale on five

different occasions. The actual amounts he pours are shown below:

0.80 kg, 0.90 kg, 1.0 kg, 1.1 kg, 1.2 kg

Which of the following best describes his results?

A. While inconsistent, his average of 1.0 kg made his results quite

accurate

O

B. His results were very consistent.

O

C. His results were both precise and accurate.

O

D. His results were very precise.

+1

Answers (1)

Know the Answer?

Gwendolyn · Answer 1

A. While inconsistent, his average of 1.0 kg made his results quite

accurate

Explanation:

Accuracy is how close the value you gain from test or observation compared with the real value. In this test, all tests relatively close to 1kg and the average of the test is 1kg so this tool can be considered quite accurate.

The precision determines how close the value of multiple repetitions of the test. In this case, the value varies from 0.8kg to 1.2kg. The highest value is about 50% higher than the lowest value, so the range is pretty far and the test can be considered not precise.