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Earn +20 ptsQ: The essence of an experiment as opposed to an observational study is to?
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What type of experiment is an observational study?
In Vivo
What difference between an observational study and an experiment?
in an experiment, the researcher manipulates a variable
A relationship between two or more variables that is shown in an observational study is a?
Correlation-apex (;
What is a study of small group behavior of a selected random sample called?
controlled experiment
How does the sample size affect an experiment?
Sample size greatly reduces any error to randomness in a given sample. Each experiment requires a proper size of a sample. The better it is fitted to the experiment, the better is the result. For example, if you are trying to find out the study habits of students at your school of 1000 kids, a sample size of 50 would be sufficient. However, if you are trying to find out the study habits of students across the US, a sample size of at least several hundred-thousand would be required, preferably several million.
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