Created
March 25, 2014 12:17
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| sqrt - square root | |
| up = good +(fair/2 ) | |
| down =poor +(fair/2 ) | |
| n = up + down (count voice ) | |
| z = 1.64485; //1.0 = 85%, 1.6 = 95% constant | |
| phat = up / n; (good / count voice(n)) | |
| (phat+z*z/(2*n)-z*sqrt((phat*(1-phat)+z*z/(4*n)/n))/(1+z*z/n); | |
| doc http://habrahabr.ru/company/darudar/blog/143188/#habracut |
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