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A Study Is Under Way in Yosemite National Forest to Determine

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A study is under way in Yosemite National Forest to determine the adult height of American pine trees.Specifically,the study is attempting to determine what factors aid a tree in reaching heights greater than 60 feet tall.It is estimated that the forest contains 25,000 adult American pines.The study involves collecting heights from 250 randomly selected adult American pine trees and analyzing the results.Identify the sample in the study.


Definitions:

Ecological Validity

A property of research such that the focus of study is something that occurs naturally outside an experimental laboratory.

Naturalistic Observation

A research paradigm in which an observer observes participants in familiar everyday contexts while ideally remaining as unobtrusive as possible.

Experiment

A test of a scientific theory in which the researcher manipulates the independent variable.

Experiment

A method of research in the sciences or social sciences in which a controlled procedure is conducted to test a hypothesis, observe effects, and establish cause and effect relationships.

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