condition mean min max ZT0-3 0.00785465 0.0 0.02356395 ZT4-7 0.0 0.0 0.0 ZT8-11 0.11496819999999999 0.11496819999999999 0.11496819999999999 ZT12-15 0.24703275000000002 0.143104 0.35096150000000004 ZT16-19 0.1517426 0.1517426 0.1517426 ZT20-23 0.11719485 0.11719485 0.11719485