condition mean min max ZT0-3 4955.9 4955.9 4955.9 ZT4-7 4515.0 4515.0 4515.0 ZT8-11 4520.2 4520.2 4520.2 ZT12-15 4808.5 4808.5 4808.5 ZT16-19 5874.450000000001 5874.450000000001 5874.450000000001 ZT20-23 5238.6 5238.6 5238.6