condition mean min max ZT0-3 0.9996499999999999 0.52148 1.47782 ZT4-7 1.2331805 1.2331805 1.2331805 ZT8-11 4.4383 4.4383 4.4383 ZT12-15 0 0 0 ZT16-19 3.782235 3.782235 3.782235 ZT20-23 2.768985 2.768985 2.768985