condition mean min max ZT0-3 171.02425 155.1625 186.886 ZT4-7 74.23005 74.23005 74.23005 ZT8-11 32.0712 32.0712 32.0712 ZT12-15 0 0 0 ZT16-19 52.2419 52.2419 52.2419 ZT20-23 80.47095 80.47095 80.47095