condition mean min max ZT0-3 5.31879 4.834245 5.803335 ZT4-7 5.803850000000001 5.803850000000001 5.803850000000001 ZT8-11 19.1019 19.1019 19.1019 ZT12-15 0 0 0 ZT16-19 22.41965 22.41965 22.41965 ZT20-23 13.57745 13.57745 13.57745