condition mean min max ZT0-3 307.529961 307.529961 307.529961 ZT4-7 92.225604 92.225604 92.225604 ZT8-11 49.881423999999996 49.881423999999996 49.881423999999996 ZT12-15 49.444632 49.444632 49.444632 ZT16-19 20.933539500000002 20.933539500000002 20.933539500000002 ZT20-23 16.363429500000002 16.363429500000002 16.363429500000002