condition mean min max ZT0-3 15.338000000000001 15.338000000000001 15.338000000000001 ZT4-7 13.9239 13.9239 13.9239 ZT8-11 28.28395 28.28395 28.28395 ZT12-15 29.54185 29.54185 29.54185 ZT16-19 30.894550000000002 30.894550000000002 30.894550000000002 ZT20-23 16.82965 16.82965 16.82965