Experimental Design
Flashcard
•
Mathematics
•
11th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the purpose of randomly assigning subjects to treatment groups?
Back
To prevent confounding of results, ensure treatment groups are similar, and evenly spread out the subjects' characteristics among the treatment groups.
2.
FLASHCARD QUESTION
Front
What happens to the precision of your estimate as you obtain more data using proper sampling techniques?
Back
The more data you obtain, the more precise (less variable) your estimate is.
3.
FLASHCARD QUESTION
Front
What is the purpose of a control group in an experiment?
Back
To ensure that you have a baseline of comparison for the effectiveness of the treatment.
4.
FLASHCARD QUESTION
Front
What is confounding in experimental design?
Back
Confounding occurs when an outside factor influences both the treatment and the outcome, making it unclear what caused the effect.
5.
FLASHCARD QUESTION
Front
What is stratified sampling?
Back
Stratified sampling involves dividing the population into subgroups (strata) and randomly selecting samples from each stratum.
6.
FLASHCARD QUESTION
Front
What is the placebo effect?
Back
The placebo effect is when participants experience a perceived improvement in their condition due to believing they are receiving treatment, even if it is inactive.
7.
FLASHCARD QUESTION
Front
What is blinding in experimental design?
Back
Blinding is a technique where participants do not know whether they are receiving the treatment or a placebo to reduce bias.
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