condition mean min max ZT0-3 1.62992625 0.944625 2.3152275 ZT4-7 0.961645 0.961645 0.961645 ZT8-11 0.480357 0.480357 0.480357 ZT12-15 0 0 0 ZT16-19 2.782574 2.782574 2.782574 ZT20-23 0.4647545 0.4647545 0.4647545