A study is under way in Yosemite National Forest to determine the adult height of American pine trees. Specically, 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 A professor of economics at a small Texas university wanted to determine what year in school students were taking his tough economics course. Shown below is a pie chart of the results. What percentage of the class took the course prior to reaching their senior year? Seniors Freshmen Juniors 30% Sophomores a. 14% b. 44% c. 86% d. 54% Those methods involving the collection, presentation, and characterization of a set of data in order to properly describe the various features of that set of data are called O a. statistical inference O b. the scientific method O c. descriptive statistics O d. sampling