find the accuracy and precision of the following numbers:
(a) 12.345
(d) 750
(b) 0.0002932
(e) 750.5
(c) 0.0029320
(f) -68.3705
Answers
Answer:
Find the difference (subtract) between the accepted value and the experimental value, then divide by the accepted value. To determine if a value is precise find the average of your data, then subtract each measurement from it. This gives you a table of deviations. Then average the deviations.
Accuracy refers to how close a measurement or a value is to the true or expected value. Precision, on the other hand, refers to how consistent or reproducible a measurement is.
(a) 12.345 - It has a high precision as it has four decimal places, indicating that the value was measured with great detail. However, we do not know if it is accurate or not without knowing what the expected or true value is.
(b) 0.0002932 - It has a high precision as it has seven decimal places, indicating that the value was measured with great detail. However, we do not know if it is accurate or not without knowing what the expected or true value is.
(c) 0.0029320 - It has a high precision as it has seven decimal places, indicating that the value was measured with great detail. However, we do not know if it is accurate or not without knowing what the expected or true value is.
(d) 750 - It has low precision as it has no decimal places, indicating that the value was measured with less detail. However, we do not know if it is accurate or not without knowing what the expected or true value is.
(e) 750.5 - It has high precision as it has one decimal place, indicating that the value was measured with moderate detail. However, we do not know if it is accurate or not without knowing what the expected or true value is.
(f) -68.3705 - It has high precision as it has four decimal places, indicating that the value was measured with great detail. However, we do not know if it is accurate or not without knowing what the expected or true value is.
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