condition mean min max ZT0-3 16.852899999999998 15.550450000000001 18.15535 ZT4-7 7.2541400000000005 7.2541400000000005 7.2541400000000005 ZT8-11 13.81305 13.81305 13.81305 ZT12-15 0 0 0 ZT16-19 17.27525 17.27525 17.27525 ZT20-23 16.501350000000002 16.501350000000002 16.501350000000002