TOTD: Observational & Experimental Studies #1

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What is an observational study?

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An observational study is a type of research where the researcher observes and records behavior or outcomes without manipulating any variables.

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What is an experiment?

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An experiment is a research method where the researcher manipulates one or more variables to determine their effect on a dependent variable.

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What is the main difference between observational studies and experiments?

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The main difference is that experiments involve imposing a treatment, while observational studies do not.

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What is a variable in an experiment?

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A variable is any factor, trait, or condition that can exist in differing amounts or types and can affect the outcome of an experiment.

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How many variables should be changed in a well-designed experiment?

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In a well-designed experiment, only one variable should be changed at a time to isolate its effects.

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What is the purpose of a control group in an experiment?

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The control group serves as a baseline to compare the effects of the treatment on the experimental group.

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What is a case study?

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A case study is an in-depth analysis of a person, group, event, or situation to explore and understand complex issues.

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What is the role of randomization in experiments?

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Randomization helps eliminate bias by randomly assigning subjects to different groups, ensuring that each group is similar.

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What is a confounding variable?

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A confounding variable is an outside influence that changes the effect of a dependent and independent variable.

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What is the significance of sample size in studies?

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A larger sample size increases the reliability of the results and reduces the margin of error.