condition mean min max ZT0-3 0.35958725 0.0909935 0.628181 ZT4-7 0.6370045 0.6370045 0.6370045 ZT8-11 0.36269799999999996 0.36269799999999996 0.36269799999999996 ZT12-15 0 0 0 ZT16-19 0.717407 0.717407 0.717407 ZT20-23 1.349545 1.349545 1.349545