condition mean min max ZT0-3 59.938118 59.938118 59.938118 ZT4-7 47.443844 47.443844 47.443844 ZT8-11 50.6237405 50.6237405 50.6237405 ZT12-15 52.4644905 52.4644905 52.4644905 ZT16-19 63.185878 63.185878 63.185878 ZT20-23 68.49274199999999 68.49274199999999 68.49274199999999