condition mean min max ZT0-3 12.044049999999999 11.8295 12.2586 ZT4-7 7.050269999999999 7.050269999999999 7.050269999999999 ZT8-11 5.97453 5.97453 5.97453 ZT12-15 0 0 0 ZT16-19 12.69775 12.69775 12.69775 ZT20-23 13.117899999999999 13.117899999999999 13.117899999999999