You Conduct a Study That Examines the Role of Exercise

question 47

Multiple Choice

You conduct a study that examines the role of exercise on depression alleviation.You assign the first 50 people who are motivated to sign up to the experimental group,and the second group of 50 people,who sign up much later,to the control group.After one month,you find that the experimental group (who exercised three times a week on average) is significantly less depressed than the control group (who exercised one time a week on average) .Although you may be tempted to conclude that exercise helps stave off depression,you cannot because of a lack of ____ in your study.

• A)random sampling
• B)random assignment
• C)random surveying
• D)objectivity

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Definitions:

Embargo Act

A law passed by the United States Congress in 1807 that prohibited American ships from trading in all foreign ports, aiming to avoid conflicts.

U.S.-Canada Border

The international boundary between the United States and Canada, recognized as the longest undefended border in the world, spanning various terrains and facilitating cross-border movement.

Smuggling

The illegal trade or transportation of goods, people, or contraband across borders, bypassing legal procedures or avoiding taxes and regulations.