The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 0 - Getting Started - Chapter 0 Exercises - Page 9: 0.1a


The lurking variables that affected the trials include the supplement takers' willingness to live a healthy lifestyle (as exhibited by their taking of possibly preventative supplements) and the "healthy user" bias that results.

Work Step by Step

By reading the description given, this information comes from the provided data.
This answer is currently locked

Someone from the community is currently working feverishly to complete this textbook answer. Don’t worry, it shouldn’t be long.