condition mean min max ZT0-3 0.22848742500000002 0.09966820000000001 0.35730665 ZT4-7 1.4592399999999999 1.4592399999999999 1.4592399999999999 ZT8-11 0.5628489999999999 0.5628489999999999 0.5628489999999999 ZT12-15 0 0 0 ZT16-19 0.29434165 0.29434165 0.29434165 ZT20-23 0.8541234999999999 0.8541234999999999 0.8541234999999999