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).
In addition to measuring the group of participants who joined a fraternity/sorority, Dr. Fletcher decides to give the same measure to another group of 55 participants who decided to not join a fraternity/sorority. Based on the results below, explain whether Dr. Fletcher should be concerned about a history threat to internal validity.
Definitions:
Ending Inventory
The total value of goods available for sale at the end of an accounting period, calculated by adding purchases to beginning inventory then subtracting goods sold.
FIFO Basis
Stands for "First In, First Out," an inventory valuation method where the costs of the earliest goods purchased or produced are the first to be recognized in determining cost of goods sold.
Perpetual Inventory System
A method where inventory quantities and cost of goods sold amounts are updated continuously as sales occur and purchases are made.
Lower-of-cost-or-market
An accounting principle that values inventory at the lower of its historical cost or current market price.
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