condition mean min max ZT0-3 13.6336 12.4089 14.8583 ZT4-7 18.588099999999997 18.588099999999997 18.588099999999997 ZT8-11 14.743400000000001 14.743400000000001 14.743400000000001 ZT12-15 0 0 0 ZT16-19 13.359499999999999 13.359499999999999 13.359499999999999 ZT20-23 15.3298 15.3298 15.3298