condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.06895616666666667 0.0 0.13791233333333333 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0