condition mean min max ZT0-3 172.72165 67.67545 240.697 ZT4-7 39.5042 39.5042 39.5042 ZT8-11 4.921835 4.921835 4.921835 ZT12-15 29.5483 23.0109 36.0857 ZT16-19 40.535 40.535 40.535 ZT20-23 96.17225 96.17225 96.17225