condition mean min max ZT0-3 13.81466 13.81466 13.81466 ZT4-7 14.119814 14.119814 14.119814 ZT8-11 12.573420500000001 12.573420500000001 12.573420500000001 ZT12-15 13.280265 13.280265 13.280265 ZT16-19 13.524386499999999 13.524386499999999 13.524386499999999 ZT20-23 11.7372835 11.7372835 11.7372835