condition mean min max ZT0-3 78.798872 78.798872 78.798872 ZT4-7 141.187926 141.187926 141.187926 ZT8-11 211.993212 211.993212 211.993212 ZT12-15 161.85666700000002 161.85666700000002 161.85666700000002 ZT16-19 140.414044 140.414044 140.414044 ZT20-23 93.4972195 93.4972195 93.4972195