The Basic Practice of Statistics 7th Edition

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

Chapter 11 - Producing Data: Part II Review - Supplementary Exercises - Page 272: 11.18c

Answer

See below.

Work Step by Step

Practical difficulties can occur when trying to contact all the students, due to not everyone wanting to take part in the study. A good alternative could be to combine different methods to contact (e.g. post, calling, e-mails) to ensure the efficiency is as good as possible.
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