Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 1 - Introduction to Statistics - 1-4 Collecting Sample Data - Basic Skills and Concepts: 8

Answer

Obervational study.

Work Step by Step

The subjects did not get any treatment, but they were only asked what makes them happy. Therefore it is an observational study.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.