condition mean min max ZT0-3 29.68445 29.68445 29.68445 ZT4-7 23.011400000000002 23.011400000000002 23.011400000000002 ZT8-11 25.1216 25.1216 25.1216 ZT12-15 25.18045 25.18045 25.18045 ZT16-19 35.05095 35.05095 35.05095 ZT20-23 32.31985 32.31985 32.31985