#### Answer

0.261

#### Work Step by Step

$s^{2}_{p} = \frac{(8-1).20 + (12-1).30}{8+12-2}$
= $\frac{1.4 + 3.3}{18} = 0.261$

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Published by
Pearson

ISBN 10:
0321755936

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

0.261

$s^{2}_{p} = \frac{(8-1).20 + (12-1).30}{8+12-2}$
= $\frac{1.4 + 3.3}{18} = 0.261$

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