how to "Harmonic Mean" manual

From: Date: Fri, 14 Dec 2007 12:57:03 +0000
Subject: how to "Harmonic Mean" manual
Groups: php.general 
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i know stats_harmonic_mean(), but i am not server admin, i can't install PECL, so i need make it by manual, but i have't Statistics knowledge, any one can help me ? thank you very much !!

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