condition mean min max ZT0-3 10.141265 10.141265 10.141265 ZT4-7 10.581784500000001 10.581784500000001 10.581784500000001 ZT8-11 11.173078 11.173078 11.173078 ZT12-15 9.563911000000001 9.563911000000001 9.563911000000001 ZT16-19 11.006553 11.006553 11.006553 ZT20-23 9.164116 9.164116 9.164116