Source: Parallax Test Prep Blog

Parallax Test Prep Blog Standard Deviation Questions in The 2016 Official Guide for GMAT Review and Supplement

The Official Guide for GMAT Review, 2016 page 21, question 9 page 25, question 31 page 171, question 133 page 281, question 47 page 288, question 123

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Est. Annual Revenue
$100K-5.0M
Est. Employees
25-100
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