Question

question 1 of 10
which is an example of an experiment?
a. testing the effectiveness of a new hair product by allowing one group to use it and comparing results against a group that doesnt use it
b. collecting the cholesterol readings of a group of elderly people in a small town
c. interviewing college students to find what percentage expect a job immediately after graduation
d. calling a sample of registered voters before an election to find out what issues concern them most

Explanation:

An experiment involves manipulating a variable (using the hair product or not) and comparing results. Option A has a treatment group (uses the product) and a control group (doesn't use it), which is the structure of an experiment. Option B is just data collection (observational study). Option C is a survey (collecting opinions via interview). Option D is also a survey (collecting opinions via call).

Answer:

A. Testing the effectiveness of a new hair product by allowing one group to use it and comparing results against a group that doesn't use it