condition mean min max ZT0-3 38.288349999999994 34.97275 41.60395 ZT4-7 24.7613 24.7613 24.7613 ZT8-11 29.9912 29.9912 29.9912 ZT12-15 0 0 0 ZT16-19 59.2699 59.2699 59.2699 ZT20-23 47.9942 47.9942 47.9942