In Creating Groups of Subjects for an Experimental Study, Which

question 4

Multiple Choice

In creating groups of subjects for an experimental study, which one of the following procedures would MOST likely produce random groups for a class of thirty students?

• A) A coin is tossed in order to select students alternately one by one into the experimental and control groups.
• B) The first ten students who enter the classroom are placed into the experimental group and the next ten into the control group.
• C) The first twenty volunteers are selected from the physics class and alternately placed into experimental and control groups.
• D) The twenty students with the highest GPAs are selected and alternately placed into experimental and control groups.

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Definitions:

Loop Colostomy

A surgical procedure where a loop of the colon is brought out through the abdominal wall to form a stoma for the passage of stool.

Plastic Rod

A lightweight, sturdy rod made from plastic material, often used in construction, crafts, or manufacturing.

Peristalsis

The wave-like muscle contractions that move food through the digestive tract, from the esophagus to the colon.

Haustral Churning

The slow movement of the contents within the large intestine, facilitated by the segmentation movements of the haustra, aiding in water absorption and feces formation.