A handbook lists the density of lead as 11.3 g/mL. Several groups of students are attempting to determine the density of a lead weight by various methods. Calculate the average density measured by each group, and the percentage error in each average. Group 1 Group 2 Group 3
Measured Trial 1 12.7 11.5 10.9
Densities Trial 2 11.2 11.4 11.3
(g/mL) Trial 3 10.3 11.4 11.1
Which group was most accurate?
a. Group 1
b. Group 2
c. Group 3
Which group was most precise?
a. Group 1
b. Group 2
c. Group 3