Answer
Observational study.
Work Step by Step
The selected children were living in their houses before the experiment. No attempt was made to influence the value of the explanatory variable (the proximity to high-tension wires).
Statistics: Informed Decisions Using Data (4th Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0321757270
ISBN 13:
978-0-32175-727-2
Chapter 1 - Section 1.2 - Assess Your Understanding - Vocabulary and Skill Building - Page 20: 9
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.
