## Statistics (12th Edition)

Published by Pearson

# Chapter 9 - Inferences Based on Two Samples - Exercises 9.1 - 9.29 - Learning the Mechanics - Page 423: 9.8a

190

#### Work Step by Step

$s^{2}_{p} = \frac{(25-1)200 + (25-1)180}{25+25-2}$ = $\frac{4800 + 4320}{48} = 190$

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