condition mean min max ZT0-3 63.170665 63.170665 63.170665 ZT4-7 93.4768205 93.4768205 93.4768205 ZT8-11 110.622373 110.622373 110.622373 ZT12-15 70.6034185 70.6034185 70.6034185 ZT16-19 103.7167725 103.7167725 103.7167725 ZT20-23 102.633467 102.633467 102.633467