The heights, in inches, of 12 students are listed below.61, 67, 72, 62, 65, 59, 60, 79, 60, 61, 64, 63

Correct option is Option Number 2,
Explanation:
It is not a casual relationship as the number of pages of a research paper does not depend upupothe n the typing speed.
All other options are in casual relationship.
So, correction option is 2.