condition mean min max ZT0-3 111.38217499999999 69.63435 153.13 ZT4-7 24.9156 24.9156 24.9156 ZT8-11 6.6438950000000006 6.6438950000000006 6.6438950000000006 ZT12-15 0 0 0 ZT16-19 21.5534 21.5534 21.5534 ZT20-23 30.1298 30.1298 30.1298