condition mean min max ZT0-3 107.085193 107.085193 107.085193 ZT4-7 146.317562 146.317562 146.317562 ZT8-11 156.1534985 156.1534985 156.1534985 ZT12-15 159.0565 159.0565 159.0565 ZT16-19 124.2364005 124.2364005 124.2364005 ZT20-23 120.839764 120.839764 120.839764