If, in the previous question, the correlation had been -1.0, what would happen after the students are asked to line up by weight?
A) About half of the students will move; others will stay in place.
B) Only the 13th student will stay in place; everyone else will move to the same position but in the opposite end of the line.
C) Everyone will have to move, but in no discernible pattern.
D) No one will have to move.

Question

Quizplus · Accepted Answer

A correlation of -1.0 indicates a perfect negative relationship between two variables. In this context, it means that as one variable (height) increases, the other variable (weight) decreases in a perfectly predictable manner. Therefore, if students are already lined up by height, asking them to line up by weight would result in everyone except the student exactly in the middle (assuming an odd number of students for a clear middle) moving to mirror positions at the opposite end of the line, reflecting the perfect inverse relationship between their heights and weights.

If, in the Previous Question, the Correlation Had Been -1