condition mean min max ZT0-3 921.5 921.5 921.5 ZT4-7 710.1 710.1 710.1 ZT8-11 893.35 893.35 893.35 ZT12-15 850.5999999999999 850.5999999999999 850.5999999999999 ZT16-19 1031.9 1031.9 1031.9 ZT20-23 1058.5 1058.5 1058.5