What is the key difference between an experiment and an observational study? We can only perform observational studies on people. Only experiments can have an explanatory and response variable. Only experiments impose a treatment to the subjects. Only observational studies require randomization. O There is no difference. Experiments and observational studies are two terms that mean the same thing.

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What is the key difference between an experiment and an observational study?
O We can only perform observational studies on people.
O Only experiments can have an explanatory and response variable.
O Only experiments impose a treatment to the subjects.
O Only observational studies require randomization.
O There is no difference. Experiments and observational studies are two terms that mean the
same thing.
Transcribed Image Text:What is the key difference between an experiment and an observational study? O We can only perform observational studies on people. O Only experiments can have an explanatory and response variable. O Only experiments impose a treatment to the subjects. O Only observational studies require randomization. O There is no difference. Experiments and observational studies are two terms that mean the same thing.
Which of the following describes a parameter?
O A value that is not numerical.
O The list of all of the data we are interested in.
O A list of some (or a subset) of the data that we are interested in.
O A measurement or calculation using all the data we are interested in.
O A measurement or calculation using the data sampled.
Transcribed Image Text:Which of the following describes a parameter? O A value that is not numerical. O The list of all of the data we are interested in. O A list of some (or a subset) of the data that we are interested in. O A measurement or calculation using all the data we are interested in. O A measurement or calculation using the data sampled.
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