question 1 of 10 which situation is an exampl...
question 1 of 10 which situation is an example of an observational study? 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 b. collecting the cholesterol readings of a group of people in a certain age group in a small town c. finding out the number of monthly burglaries of a residential neighborhood for a statistical study for the police d. calling a sample of registered voters before an election to find out what issues concern them most
Answer
# Brief Explanations:
An observational study just observes and records data without interfering. Option A is an experiment as it involves treatment (using the hair - product). Option B is just collecting data on cholesterol readings without any intervention. Option C is collecting data on burglaries for a study without interfering. Option D is a survey. Both B and C are observational studies, but B is more typical as it's about collecting health - related data which is a common area for observational studies.
# Answer:
B. Collecting the cholesterol readings of a group of people in a certain age group in a small town