Question

to determine if a drug has an effect on patient illness, a researcher gives the drug to 100 patients and gives a placebo to another group of 100 patients.

what type of study is this?

Explanation:

Identify the key characteristics of the study

In this scenario, a researcher actively applies a treatment (giving a drug to one group of 100 patients and a placebo to another group of 100 patients) to observe the effects on patient illness.

Distinguish between study types

• Observational Study: The researcher observes individuals and measures variables of interest without attempting to influence the responses or apply any treatment.
• Experimental Study (or Experiment): The researcher deliberately imposes a treatment on individuals to measure their responses and observe the causal effects.

Determine the correct classification

Because the researcher actively administers a drug to one group and a placebo to another (imposing treatments on the subjects), this is classified as an experiment (or an experimental study).

Answer:

To determine if a drug has an effect on patient illness, a researcher gives the drug to 100 patients and gives a placebo to another group of 100 patients.

What type of study is this? <blank>experiment</blank>