Sia
Question
Math
Posted 10 months ago
A company wants to study the effectiveness of a new pain relief medicine. They recruit 100 volunteers who suffer chronic pain.
They assign each subject a number from 1 to 100 and use a random number generator to assign the first 50 subjects selected to the treatment group. The remaining 50 subjects are assigned to the control group.
What type of experiment design is this?
Choose 1 answer:
A Completely randomized
(B) Cluster
(C) Randomized block
D Matched pairs
(E) Stratified
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Answer from Sia
Posted 10 months ago
Solution by Steps
step 2
Recognize that a random number generator is used to assign subjects to either the treatment or control group without any regard for potential confounding variables
step 3
Understand that in a completely randomized design, subjects are assigned to different treatment groups entirely by chance
step 4
Note that other designs like cluster, randomized block, matched pairs, and stratified involve some form of stratification or pairing based on certain characteristics, which is not mentioned in the scenario
[question number] Answer
A
Key Concept
Completely Randomized Design
Explanation
In a completely randomized design, all subjects have an equal chance of being assigned to any group, and assignment is made randomly without any stratification or pairing.
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