A Group of 100 Students Is Randomly Chosen and Divided

question 52

Multiple Choice

A group of 100 students is randomly chosen and divided into two groups. One group is taught typing using a set of new materials and the other using traditional methods. After instruction, typing speeds are compared to determine if the new materials improve learning. This type of study is a(n) :

• A) comparative experiment.
• B) observational study.
• C) prospective study.
• D) retrospective study.

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Definitions:

Respiratory Tract

The passageway that makes up the breathing system, including the nose, throat, and lungs, responsible for air passage.

Alveoli

Tiny air sacs within the lungs where the exchange of oxygen and carbon dioxide takes place.

Half-Life

The time required for a quantity to reduce to half its initial value, often used in the context of radioactive decay or pharmacokinetics.

Respiratory Passages

The airways in the human body through which air flows in and out of the lungs, including the nose, throat, and bronchi.