Answer: Group 4 had the best "precision".
Step-by-step explanation:
This is a bit of a trick question. The concept being tested here is whether you understand the difference between "accuracy" and "precision."
Accuracy is how close you are to the actual answer. In this question, Group 2 is probably the most accurate since their average is near 113 (i.e., 112.5).
However, the question is asking for precision, which is how close your answers are to each other. Think of it as "consistency" (even if you are consistently wrong... at least you are "precise"!). Group 4 is the most precise, because all of their measurements are practically the same: 110, 111, 111, 110 are all basically 110. This is NOT the most accurate, but it IS the most PRECISE. :)