A second group of researchers find 400 participants who are screened for things like lifestyle preferences. They use a computer program to assign 100 participants to each of the 3 treatment groups and 100 participants to the control group. These participants will receive free groceries for life in exchange for their participation. Researchers follow up with participants once every 10 years to collect data on their health for the rest of their life.This can be considered an experiment because the researchers used:Hint, displayed belowRandom AssignmentLurking VariablesSample SurveyExperimental Design
Question
A second group of researchers find 400 participants who are screened for things like lifestyle preferences. They use a computer program to assign 100 participants to each of the 3 treatment groups and 100 participants to the control group. These participants will receive free groceries for life in exchange for their participation. Researchers follow up with participants once every 10 years to collect data on their health for the rest of their life.This can be considered an experiment because the researchers used:Hint, displayed belowRandom AssignmentLurking VariablesSample SurveyExperimental Design
Solution
This can be considered an experiment because the researchers used Random Assignment and Experimental Design.
Here's why:
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Random Assignment: The researchers used a computer program to randomly assign 100 participants to each of the 3 treatment groups and 100 participants to the control group. This ensures that each participant has an equal chance of being placed in any group, which helps to control for any potential confounding variables.
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Experimental Design: The researchers have a clear plan for conducting the experiment, including a control group and follow-up data collection. They also have a clear outcome measure (health data). This structured approach is characteristic of an experimental design.
Lurking Variables and Sample Survey are not the correct answers because:
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Lurking Variables: These are variables that are not controlled for in the study, and could potentially influence the results. The question does not provide information about any lurking variables.
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Sample Survey: This is a method of data collection where a sample of individuals are selected from a population and surveyed. While the researchers do collect data from the participants, the main focus of the study is the experiment, not the survey.
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