condition mean min max ZT0-3 43.467400000000005 35.291000000000004 51.643800000000006 ZT4-7 16.62125 16.62125 16.62125 ZT8-11 20.0348 20.0348 20.0348 ZT12-15 0 0 0 ZT16-19 22.6973 22.6973 22.6973 ZT20-23 19.115850000000002 19.115850000000002 19.115850000000002