condition mean min max ZT0-3 2.07805 1.75462 2.4014800000000003 ZT4-7 4.58284 4.58284 4.58284 ZT8-11 2.6317950000000003 2.6317950000000003 2.6317950000000003 ZT12-15 0 0 0 ZT16-19 2.1094850000000003 2.1094850000000003 2.1094850000000003 ZT20-23 2.4583950000000003 2.4583950000000003 2.4583950000000003