question 5 of 10\nwhich situation is an examp...
question 5 of 10\nwhich situation is an example of an observational study?\na. collecting the cholesterol readings of a group of elderly people in a small town\nb. 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\nc. calling a sample of registered voters before an election to find out what issues concern them most\nd. interviewing college students to find what percentage expect a job immediately after graduation
Answer
# Brief Explanations:
An observational study just observes and records data without interfering or manipulating variables. In option A, cholesterol readings are simply collected without any intervention. Option B is an experiment as it involves a treatment (using the hair - product). Options C and D are surveys as they involve asking questions.
# Answer:
A. Collecting the cholesterol readings of a group of elderly people in a small town