Which is an example of a survey? a. finding out the number of burglaries of a residential neighborhood in each month for the police department b. collecting the cholesterol readings of a group of individuals of a certain age group in a small town c. interviewing college students to find what percentage expects a job immediately after graduation d. testing the effectiveness of a hair product by allowing one group to use it and comparing results against a control group

D. Testing the effectiveness of a hair product allowing one group to use it and comparing results against a control group.

Step-by-step explanation:

By definition, survey is a method of gathering information from a sample of people, traditionally with the intention of generalizing the results to a larger population.

From this definition it shows that during survey a group of entity (sample) representing the entirety (population) will be examine.

Therefore option

D. Testing the effectiveness of a hair product allowing one group to use it and comparing results against a control group.

From this one group is examine but generalizing the results to a larger population.

the correct answer is the second option

3; 9 is 8 to -4

step-by-step explanation: