If the true value for a measurement is 50.00 mL, which student's measurements are neither precise nor accurate? A 49.95 mL, 49.98 mLB 50.05 mL, 49.97 mLC 48.00 mL, 52.00 mLD 50.01 mL, 49.99 mL
Question
If the true value for a measurement is 50.00 mL, which student's measurements are neither precise nor accurate? A 49.95 mL, 49.98 mLB 50.05 mL, 49.97 mLC 48.00 mL, 52.00 mLD 50.01 mL, 49.99 mL
Solution
The student's measurements that are neither precise nor accurate are C. 48.00 mL, 52.00 mL.
Here's why:
Accuracy refers to how close a measurement is to the true or accepted value. In this case, the true value is 50.00 mL. Measurements from student C (48.00 mL and 52.00 mL) are farthest from the true value, so they are not accurate.
Precision refers to how close a series of measurements are to each other. Looking at the pairs of measurements, student C's measurements (48.00 mL and 52.00 mL) have the largest difference between them (4.00 mL), so they are not precise.
Therefore, student C's measurements are neither precise nor accurate.
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