condition mean min max ZT0-3 12.730175000000001 11.1525 14.307850000000002 ZT4-7 23.1207 23.1207 23.1207 ZT8-11 23.9817 23.9817 23.9817 ZT12-15 0 0 0 ZT16-19 12.85 12.85 12.85 ZT20-23 12.2653 12.2653 12.2653