condition mean min max ZT0-3 172.379236 172.379236 172.379236 ZT4-7 199.4007385 199.4007385 199.4007385 ZT8-11 224.0119095 224.0119095 224.0119095 ZT12-15 206.490318 206.490318 206.490318 ZT16-19 283.457386 283.457386 283.457386 ZT20-23 314.146677 314.146677 314.146677