condition mean min max ZT0-3 182.637378 182.637378 182.637378 ZT4-7 244.933644 244.933644 244.933644 ZT8-11 253.055632 253.055632 253.055632 ZT12-15 242.46979149999999 242.46979149999999 242.46979149999999 ZT16-19 166.46691 166.46691 166.46691 ZT20-23 153.1851705 153.1851705 153.1851705