condition mean min max ZT0-3 0.23920275000000002 0.20389 0.2745155 ZT4-7 0.348119 0.348119 0.348119 ZT8-11 0.30813999999999997 0.30813999999999997 0.30813999999999997 ZT12-15 0 0 0 ZT16-19 0.5398155 0.5398155 0.5398155 ZT20-23 0.305243 0.305243 0.305243