condition mean min max ZT0-3 9033.6 9033.6 9033.6 ZT4-7 14116.2 14116.2 14116.2 ZT8-11 13029.95 13029.95 13029.95 ZT12-15 7560.799999999999 7560.799999999999 7560.799999999999 ZT16-19 3369.7 3369.7 3369.7 ZT20-23 4589.1 4589.1 4589.1