Video Transcript
The diagram shows a target board
and four sets of hits on it, (A), (B), (C) and (D). The shots were all aimed at the
center of the target. Which one of the sets is the most
precise?
Before we try to answer this
question, let’s make sure we understand what precision means. Precision is a measure of how close
together the values in a set of data are to each other. In this case, we’re looking at
shots on a target. If the shots are all close
together, then the set is very precise. If the shots are far apart, then
they aren’t precise at all.
It’s important to understand that
the precision is only determined by how close the shots are to each other. It doesn’t matter how close they
are to anything else. So the fact that the shots were all
aimed at the center of the target is actually irrelevant for this question.
Looking at the options given to us,
we can see that the shots are all closest together in option (C). So this set is the most precise,
and option (C) is the correct answer.
