condition mean min max ZT0-3 5098.213808 5098.213808 5098.213808 ZT4-7 7799.2518765 7799.2518765 7799.2518765 ZT8-11 7927.711458 7927.711458 7927.711458 ZT12-15 7118.143336 7118.143336 7118.143336 ZT16-19 6060.3132765 6060.3132765 6060.3132765 ZT20-23 4598.32492 4598.32492 4598.32492