condition mean min max ZT0-3 8.175395 8.175395 8.175395 ZT4-7 4.869635000000001 4.869635000000001 4.869635000000001 ZT8-11 14.9149 14.9149 14.9149 ZT12-15 28.0639 28.0639 28.0639 ZT16-19 22.2557 22.2557 22.2557 ZT20-23 12.92555 12.92555 12.92555