A study is under way in the Otway National Park to determine the mature height of Mountain Ash gum trees.Specifically,the study is attempting to determine what factors aid a tree in reaching heights greater than 60 metres tall.It is estimated that the park contains 25,000 mature Mountain Ash gum trees.The study involves collecting heights from 250 randomly selected mature Mountain Ash gum trees and analysing the results.
- Identify the variable of interest in the study.
A) The age of a Mountain Ash gum tree in the Otway National Park.
B) The height of a Mountain Ash gum tree in the Otway National Park.
C) The species of trees in the Otway National Park.
D) The number of Mountain Ash gum trees in the Otway National Park.

Question

Quizplus · Accepted Answer

The variable of interest in the study is the height of the Mountain Ash gum trees. This is what the study is attempting to determine - what factors aid a tree in reaching heights greater than 60 metres tall. The other options may be relevant to the study, but they are not the main focus or variable of interest.

A Study Is Under Way in the Otway National Park