The following measurements of the mass of an aspirin tablet were made by different students in a lab. Which set is the most precise?
A)1.513 g, 1.503 g, 1.522 g
B)1.513 g, 1.511 g, 1.450 g
C)1.513 g, 1.459 g, 1.533 g
D)1.513 g, 1.517 g, 1.512 g
E)1.513 g, 1.510 g, 1.523 g

Question

Quizplus · Accepted Answer

The set of measurements in choice D has the smallest range (maximum value minus minimum value), which indicates the most precise measurements. All three measurements are also relatively close to each other, further supporting their precision. Choices A and C have larger ranges and choices B and E have one measurement that is significantly different from the other two, indicating less precision.

The Following Measurements of the Mass of an Aspirin Tablet