condition mean min max ZT0-3 104.120704 104.120704 104.120704 ZT4-7 143.615658 143.615658 143.615658 ZT8-11 147.8431535 147.8431535 147.8431535 ZT12-15 127.62097800000001 127.62097800000001 127.62097800000001 ZT16-19 128.0642385 128.0642385 128.0642385 ZT20-23 101.4533295 101.4533295 101.4533295