condition mean min max ZT0-3 93.081585 93.081585 93.081585 ZT4-7 66.1655305 66.1655305 66.1655305 ZT8-11 49.7335385 49.7335385 49.7335385 ZT12-15 60.884159 60.884159 60.884159 ZT16-19 61.458151 61.458151 61.458151 ZT20-23 63.401375 63.401375 63.401375