The Basic Practice of Statistics 7th Edition

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

Chapter 7 - Exploring Data: Part I Review - Test Yourself: 7.38c

Answer

$b = r\frac{s_{y}}{s_{x}} = (-0.98)\frac{7.0}{14.0} = -0.49$ a = ȳ - bx̄ = 27.2 - (-0.49) (1992) = 1003.28 General least square regression line is: ŷ = a + bx = 1003.28 - 0.49x

Work Step by Step

$b = r\frac{s_{y}}{s_{x}} = (-0.98)\frac{7.0}{14.0} = -0.49$ a = ȳ - bx̄ = 27.2 - (-0.49) (1992) = 1003.28 General least square regression line is: ŷ = a + bx = 1003.28 - 0.49x
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