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D Question 3 1 pts Which of the following would be the BEST example of time series data? GDP for France each year for 10 years GDP for all countries in the European Union for 10 years GDP for all countries in the European Union last year Question 4 1 pts Observational studies make an attempt to influence some variables in order to observe how changes in these variables affect outcomes. True False

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Answer #1

(Question 3) Option (1)

A time series data measures the values of the same variable over time. Option (1) measures the value of GDP of France (variable in question) over time, so it is time series data. Option (2) measures GDP of all countries in EU over time, so this is Panel data. Option (3) measures GDP of all countries in EU for last year, so this is Cross-section data.

(Question 4) False

In observational study, the researcher observes an outcome without trying to change or influence any variable in the study.

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