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 population from which the study was sampled.
A) all American pine trees, of any age, in the forest
B) the 250 randomly selected adult American pine trees
C) all the adult American pine trees taller than 60 feet
D) the 25,000 adult American pine trees in the forest

Question

Quizplus · Accepted Answer

The population from which the study was sampled is the entire group of adult American pine trees in the Yosemite National Forest, which is estimated to be 25,000. This is the population because the study is attempting to determine what factors contribute to pine trees' growth to heights greater than 60 feet tall, which would include all adult pine trees in the forest, not just the ones over 60 feet. The sample size is 250, which is a representative subset of the population.

A Study Is Under Way in Yosemite National Forest to Determine