condition mean min max ZT0-3 23.709466666666664 14.726299999999998 41.38475 ZT4-7 92.5589 92.5589 92.5589 ZT8-11 71.15395 71.15395 71.15395 ZT12-15 53.459225 32.3614 74.55705 ZT16-19 29.6507 29.6507 29.6507 ZT20-23 34.671350000000004 34.671350000000004 34.671350000000004