condition mean min max ZT0-3 8.894845 8.894845 8.894845 ZT4-7 8.020185000000001 8.020185000000001 8.020185000000001 ZT8-11 7.615495 7.615495 7.615495 ZT12-15 6.31764 6.31764 6.31764 ZT16-19 10.898015000000001 10.898015000000001 10.898015000000001 ZT20-23 9.181329999999999 9.181329999999999 9.181329999999999