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Homework 0

17 bytes added, 17:19, 7 May 2018
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$sigma = sqrt( ((@set_a-1)*$var_a + (@set_b-1)*$var_b) / $df );<br />
$p = ($avg_a - $avg_b) / ($sigma * sqrt( 1/@set_a + 1/@set_b));</p>
 
<p>print(p)</p>