condition mean min max ZT0-3 1.922525 1.922525 1.922525 ZT4-7 22.65735 22.65735 22.65735 ZT8-11 17.442999999999998 17.442999999999998 17.442999999999998 ZT12-15 4.64242 4.64242 4.64242 ZT16-19 0.657327 0.657327 0.657327 ZT20-23 0.9299155000000001 0.9299155000000001 0.9299155000000001