The Basic Practice of Statistics 7th Edition

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

Chapter 26 - Inference for Regression - Apply Your Knowledge - Page 633: 26.14c

Answer

See below.

Work Step by Step

We don't know if any of the $38$ children are related or if they were randomly selected, thus we can't say that the $38$ observations are independent. No information at all has been given of the selection procedures of the $38$ children.
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