condition mean min max ZT0-3 92.770558 92.770558 92.770558 ZT4-7 253.3520755 253.3520755 253.3520755 ZT8-11 241.32224050000002 241.32224050000002 241.32224050000002 ZT12-15 219.266886 219.266886 219.266886 ZT16-19 108.3422925 108.3422925 108.3422925 ZT20-23 64.68838600000001 64.68838600000001 64.68838600000001