condition mean min max ZT0-3 45.551125 42.9476 48.154650000000004 ZT4-7 57.6474 57.6474 57.6474 ZT8-11 59.657700000000006 59.657700000000006 59.657700000000006 ZT12-15 0 0 0 ZT16-19 53.6862 53.6862 53.6862 ZT20-23 47.9256 47.9256 47.9256