condition mean min max ZT0-3 81.95255 81.02405 82.88105 ZT4-7 106.176 106.176 106.176 ZT8-11 62.600300000000004 62.600300000000004 62.600300000000004 ZT12-15 0 0 0 ZT16-19 18.122999999999998 18.122999999999998 18.122999999999998 ZT20-23 64.49634999999999 64.49634999999999 64.49634999999999