Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321755936
ISBN 13: 978-0-32175-593-3

Chapter 11 - Simple Linear Regression - Exercises 11.11 - 11.31 - Applying the Concepts - Basic - Page 562: 11.20c

Answer

Since data is only observed from year 1400 - 2000, and the line is based on this data which means that data before this time period is not included. Moreover, we observe that the line does not fit data perfectly, hence it is not a true line of means

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