condition mean min max ZT0-3 317.521742 317.521742 317.521742 ZT4-7 409.59646299999997 409.59646299999997 409.59646299999997 ZT8-11 450.708089 450.708089 450.708089 ZT12-15 394.644452 394.644452 394.644452 ZT16-19 421.6272805 421.6272805 421.6272805 ZT20-23 465.1536525 465.1536525 465.1536525