Dr Fletcher Is Interested in Understanding Whether Joining a Fraternity/sorority

question 51

Essay

Dr. Fletcher is interested in understanding whether joining a fraternity/sorority causes people to become more concerned about their attractiveness and appearance. He recruits a group of 55 freshmen (25 males, 30 females) who are planning to go through fraternity/sorority recruitment on his campus. After they join, he gives them a measure of attractiveness concern/appearance concern (the Body Concern Scale, where higher scores indicate higher body concerns).
As the study is described, explain a selection threat that may be present in Dr. Fletcher's study. What could Dr. Fletcher do to address this threat?

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Definitions:

High-Low Method

An accounting technique used to estimate the fixed and variable components of a cost based on the highest and lowest activity levels.

Least-Squares Regression

A statistical method used to determine the line of best fit by minimizing the sum of the squares of the vertical distances of the points from the line.

Least-Squares Regression

A statistical method used to determine the best-fitting line through a set of points, minimizing the sum of the squares of the distances of the points from the line.

Statistical Evidence

Data collected and analyzed for the purpose of supporting a conclusion or hypothesis.