The Basic Practice of Statistics 7th Edition

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

Chapter 4 - Scatterplots and Correlation - Chapter 4 Exercises - Page 122: 4.29c

Answer

The correlation with the outlier: .849 The correlation without the outlier: .701 The outlier does have somewhat of an influence on the correlation. Adding the outlier causes the correlation to increase due to the higher standard deviation and mean for the group of data points,

Work Step by Step

The correlations were calculated in Microsoft Excel. Adding the outlier causes the correlation to increase due to the higher standard deviation and mean for the group of data points,
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