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 (in this case, the use of a new hair product) and comparing results between groups (one group uses the product, the other doesn't). Option A fits this definition. Option B is just data collection (no manipulation), option C is an interview (a form of data - gathering without manipulation), and option D is a survey (also data - gathering without manipulation).

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