A Study Is Under Way in the Otway National Park

question 63

Multiple Choice

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.

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Definitions:

Set of Data

A collection of related pieces of information or numerical values subject to analysis.

Mean

The central value of a numeric dataset, determined by summing all the numbers and dividing by the total number of values present.

Frequency Distribution

A statistical representation showing the number of occurrences of each distinct value in a set of data.

Median

The middle value of a data set, which separates the higher half from the lower half of the data set.