condition mean min max ZT0-3 377.914522 377.914522 377.914522 ZT4-7 377.0782105 377.0782105 377.0782105 ZT8-11 370.0618565 370.0618565 370.0618565 ZT12-15 340.03967 340.03967 340.03967 ZT16-19 343.26575549999995 343.26575549999995 343.26575549999995 ZT20-23 234.7366255 234.7366255 234.7366255