Consider the following data from groups in Mr. Dalton's class for the mass of an object: Group 1 (12.53 g), Group 2 (12.82 g), Group 3 (11.78 g), Group 4 (11.95 g), Group 5 (12.02 g), Group 6 (12.10 g), Group 7 (11.83 g). Calculate the average mass, determine the uncertainty, and find the percent error for Group 1's measurement based on an accepted mass of 12.15 g. Compare the precision of Mr. Dalton's class with Mr. Rutherford's class, which has an answer of 12.05 ± 0.45 g.