please help me. i am confused with my textbook. somebody please explain it to me
2006-09-16 08:21:10 · 5 answers · asked by anonymous 2 in Science & Mathematics ➔ Chemistry
A dartboard analogy is often used to help students understand the difference between accuracy and precision. Imagine a person throwing darts, trying to hit the bullseye. The closer the dart hits to the bullseye, the more accurate his or her tosses are. If the person misses the dartboard with every throw, but all of their shots land close together, they can still be very precise.
Accuracy is how well information or data matches true values. Precision refers to the level of measurement.
Accuracy is defined as the ability to get the correct result. Precision is the ability to produce repeated results with small differences between them.
Accuracy can also be defined as the agreement of the average value of a set of measurements on the same material with an accepted value for that material (i.e. a minimum amount of biased deviation). Precision is the agreement of each value in a set of measurement on the same material with the average value of the set (i.e. a minimum amount of standard deviation).
Accuracy is the degree of veracity while precision is the degree of reproducibility. The analogy used here to explain the difference between accuracy and precision is the target comparison.
2006-09-16 08:24:30 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Precision is how how close an instrument can deliver a number, like 1.83 grams (indicated value is 1.825 to 1.835) instead of 1.8 grams (indicated value is 1.75 to 1.85).
Accuracy is how close the measurement lies to the real value.
An instrument can be very precise, but not accurate: for example a scale which weighs a 3.0 gram object as 4.995 grams. Also, instrument could be accurate, but not precise, for example weighs a 3.0 gram object as 3 grams.
2006-09-16 15:33:42 · answer #2 · answered by Ren Hoek 5 · 0⤊ 0⤋
accuracy is a lower degree of precision. precision has a smaller window of error.
2006-09-16 15:31:56 · answer #3 · answered by turtle 2 · 0⤊ 0⤋
accuracy is related to measurement the way precision is related to manufacturing
2006-09-16 15:25:28 · answer #4 · answered by raj 7 · 0⤊ 0⤋
precise is for measurements.. accuracy is for history or facts
2006-09-16 15:24:16 · answer #5 · answered by trobop 1 · 0⤊ 0⤋