condition mean min max ZT0-3 46.528800000000004 46.4134 46.6442 ZT4-7 69.20605 69.20605 69.20605 ZT8-11 83.27145 83.27145 83.27145 ZT12-15 0 0 0 ZT16-19 72.26935 72.26935 72.26935 ZT20-23 56.511750000000006 56.511750000000006 56.511750000000006