condition mean min max ZT0-3 1.058964 0.949743 1.1681849999999998 ZT4-7 1.0904699999999998 1.0904699999999998 1.0904699999999998 ZT8-11 1.759735 1.759735 1.759735 ZT12-15 0 0 0 ZT16-19 2.236265 2.236265 2.236265 ZT20-23 1.4248699999999999 1.4248699999999999 1.4248699999999999