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Answer: Three students (A, B, and C) are asked to
Chapter 1, Problem 37P(choose chapter or problem)
Three students (\(A\), \(B\), and \(C\)) are asked to determine the volume of a sample of ethanol. Each student measures the volume three times with a graduated cylinder. The results in milliliters are: \(A\) (87.1, 88.2, 87.6); \(B\) (86.9, 87.1, 87.2); \(C\) (87.6, 87.8, 87.9). The true volume is 87.0 mL. Comment on the precision and the accuracy of each student’s results.
Questions & Answers
QUESTION:
Three students (\(A\), \(B\), and \(C\)) are asked to determine the volume of a sample of ethanol. Each student measures the volume three times with a graduated cylinder. The results in milliliters are: \(A\) (87.1, 88.2, 87.6); \(B\) (86.9, 87.1, 87.2); \(C\) (87.6, 87.8, 87.9). The true volume is 87.0 mL. Comment on the precision and the accuracy of each student’s results.
ANSWER:Step 1 of 3
Here, we are asked to comment on the precision and the accuracy of the results.
Precision refers to the term used in measurements to determine the closeness of two or more values to each other, regardless of whether those measurements are accurate or not.
Accuracy refers to the term used in measurements that refer to the closeness of a value measured to a standard or known value.