condition mean min max ZT0-3 126.40775 118.296 134.5195 ZT4-7 89.5291 89.5291 89.5291 ZT8-11 39.24355 39.24355 39.24355 ZT12-15 0 0 0 ZT16-19 87.26650000000001 87.26650000000001 87.26650000000001 ZT20-23 109.6385 109.6385 109.6385