Question: determine whether the given description corresponds to an observational study or an experiment. Explain. 1) A stock analyst compares the relationship between stock prices and

determine whether the given description corresponds to an observational study or an experiment. Explain.

1) A stock analyst compares the relationship between stock prices and earnings per share to help him select a stock for investment.

2) A clinic gives a drug to a group of ten patients and a placebo to another group of ten patients to find out if the drug has an effect on the patients' illness.

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