condition mean min max ZT0-3 3172.8 3172.8 3172.8 ZT4-7 3298.9 3298.9 3298.9 ZT8-11 3106.7 3106.7 3106.7 ZT12-15 3343.95 3343.95 3343.95 ZT16-19 3501.55 3501.55 3501.55 ZT20-23 3470.7 3470.7 3470.7