condition mean min max ZT0-3 0.5011306666666666 0.2793025 0.6816635 ZT4-7 0.104344 0.104344 0.104344 ZT8-11 0.4113105 0.4113105 0.4113105 ZT12-15 0.48091150000000005 0.4495445 0.5122785000000001 ZT16-19 0.209459 0.209459 0.209459 ZT20-23 0.6053755000000001 0.6053755000000001 0.6053755000000001