condition mean min max ZT0-3 0.45067 0.351519 0.549821 ZT4-7 0.641483 0.641483 0.641483 ZT8-11 1.873745 1.873745 1.873745 ZT12-15 0 0 0 ZT16-19 1.60241 1.60241 1.60241 ZT20-23 1.247105 1.247105 1.247105