condition mean min max ZT0-3 0.76438175 0.6512715 0.8774919999999999 ZT4-7 0.5418155 0.5418155 0.5418155 ZT8-11 0.406919 0.406919 0.406919 ZT12-15 0 0 0 ZT16-19 0.766493 0.766493 0.766493 ZT20-23 0.689213 0.689213 0.689213