condition mean min max ZT0-3 541.7 541.7 541.7 ZT4-7 730.1 730.1 730.1 ZT8-11 1127.5 1127.5 1127.5 ZT12-15 1623.4 1623.4 1623.4 ZT16-19 1135.25 1135.25 1135.25 ZT20-23 717.3499999999999 717.3499999999999 717.3499999999999