Accuracy vs. Precision

Accuracy and Precision Watch the following video and then answer the questions. A measurement that closely agrees with accepted values is said to be accurate precise reliable significant Which experiment is precise? (HINT: There may be more then one answer). Experiment 1 Experiment 2 Experiment 3 Experiment 4 Which experiment is the least precise? Experiment 1 Experiment 2 Experiment 3 Experiment 4 Which experiment is accurate and precise? Experiment 1 Experiment 2 Experiment 3 Experiment 4 Which experiment is precise but not accurate? Experiment 1 Experiment 2 Experiment 3 Experiment 4 The accuracy of a measurement is how close it is to the true value. does not depend on the instrument being used to measure the object. indicated that the measurement is also precise. is something that scientists rarely achieve. Three groups of students measures the mass of a product from the same chemical reaction. The groups recorded data of 8.83 g, 8.84 g and 8.82 g. The known mass of the product from that reaction is 8.60g. The group values are _. accurate accurate and precise precise neither accurate nor precise A chemist who frequently carries out the same complex experiment is likely to have high_. accuracy precision Three different people weigh a standard mass of 2.00 g on the same balance. Each person obtains a reading of exactly 7.32 g for the mass of the standard. These results imply that the balance that was used is: neither accurate nor precise accurate but not precise precise but not accurate both accurate and precise When a measurement is repeatable and consistent it is said to have... High precision High accuracy Low precision Low accuracy