condition mean min max ZT0-3 50.824562 50.824562 50.824562 ZT4-7 66.19038950000001 66.19038950000001 66.19038950000001 ZT8-11 84.108044 84.108044 84.108044 ZT12-15 63.774896 63.774896 63.774896 ZT16-19 67.3249365 67.3249365 67.3249365 ZT20-23 62.586193 62.586193 62.586193