condition mean min max ZT0-3 8.19655 0.0 14.6592 ZT4-7 0.0 0.0 0.0 ZT8-11 5.0332 5.0332 5.0332 ZT12-15 13.1996 11.1995 15.1997 ZT16-19 14.348410000000001 14.348410000000001 14.348410000000001 ZT20-23 0.0 0.0 0.0