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? experiment

a principal conducts a study to find the average age of all math teachers in a given high school by recording all their ages.

what type of study is this?

Explanation:

Analyze the study design

Using the Observational Study and Experimental Study knowledge points

The principal wants to find the average age of all math teachers in a given high school. To do this, the principal records all of their ages.

In this scenario:

• No treatment is actively imposed or assigned to the teachers (unlike an Experimental Study where a drug or placebo is given).
• The researcher is simply gathering and recording existing data without attempting to influence or manipulate the subjects.
• Since the data is collected by observing and recording existing characteristics, this is an Observational Study (specifically, a census of that particular school's math teachers).

Answer:

A principal conducts a study to find the average age of all math teachers in a given high school by recording all their ages.

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