condition mean min max ZT0-3 0.9877185 0.6362855000000001 1.286664 ZT4-7 0.9833500000000001 0.9833500000000001 0.9833500000000001 ZT8-11 1.11844 1.11844 1.11844 ZT12-15 1.182938 0.9891645 1.3767115 ZT16-19 1.445815 1.445815 1.445815 ZT20-23 1.173165 1.173165 1.173165