#### Answer

$\bar x_{d} = 2$
$s^{2}_{d} = 2$

#### Work Step by Step

Difference
7 - 4 = 3
3 - 1 = 2
9 - 7 = 2
6 - 2 = 3
4 - 4 = 0
8 - 7 = 1
$\bar x_{d} = \frac{3+ 2+ ... + 1}{6} = 2
$s^{2}_{d} = \frac{(3-2)^2 + .... + (1 - 2)^{2}}{6 - 1} = 2

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Published by
Pearson

ISBN 10:
0321755936

ISBN 13:
978-0-32175-593-3

$\bar x_{d} = 2$
$s^{2}_{d} = 2$

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