Two students determine the percentage of lead in a sample as a laboratory
exercise. The true percentage is \(22.52 \%\). The students' results for three
determinations are as follows:
1\. \(22.52,22.48,22.54\)
2\. \(22.64,22.58,22.62\)
(a) Calculate the average percentage for each set of data, and tell which set
is the more accurate based on the average. (b) Precision can be judged by
examining the average of the deviations from the average value for that data
set. (Calculate the average value for each data set, then calculate the
average value of the absolute deviations of each measurement from the
average.) Which set is more precise?