condition mean min max ZT0-3 11.044049999999999 11.044049999999999 11.044049999999999 ZT4-7 6.89428 6.89428 6.89428 ZT8-11 8.205695 8.205695 8.205695 ZT12-15 8.904555 8.904555 8.904555 ZT16-19 14.2012 14.2012 14.2012 ZT20-23 12.45575 12.45575 12.45575