condition mean min max ZT0-3 10.141265 10.141265 10.141265 ZT4-7 12.4226655 12.4226655 12.4226655 ZT8-11 11.5562295 11.5562295 11.5562295 ZT12-15 10.2432595 10.2432595 10.2432595 ZT16-19 12.335338 12.335338 12.335338 ZT20-23 10.638603 10.638603 10.638603