condition mean min max ZT0-3 1413.2624999999998 1377.655 1448.87 ZT4-7 2119.105 2119.105 2119.105 ZT8-11 1170.21 1170.21 1170.21 ZT12-15 0 0 0 ZT16-19 786.795 786.795 786.795 ZT20-23 988.8215 988.8215 988.8215