condition mean min max ZT0-3 3541.8 3541.8 3541.8 ZT4-7 1761.8 1761.8 1761.8 ZT8-11 1647.6 1647.6 1647.6 ZT12-15 2088.35 2088.35 2088.35 ZT16-19 3955.55 3955.55 3955.55 ZT20-23 4468.299999999999 4468.299999999999 4468.299999999999