Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 4 - Section 4.1 - Assess Your Understanding - Explaining the Concepts - Page 206: 55

Answer

No. It means that the negative terms in the numerator of $r=\frac{Σ(\frac{x_i-x ̅}{s_x})(\frac{y_i-y ̅}{s_y})}{n-1}$ prevail over the positive terms.

Work Step by Step

If a above-average value of X is associated with a below-average value of Y then the term in the numerator is negative. If a above-average value of X is associated with a above-average value of Y then the term in the numerator is positive.
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