Agroup of 40 subjects was divided into two groups with one group given an energy drink and one group given water. the subjects were then given a spelling test and the mean number of words correctly spelled was recorded for each member of the two groups. this experiment was designed this way to quantify which of the following types of variability?

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.