condition mean min max ZT0-3 114.051178 114.051178 114.051178 ZT4-7 143.138293 143.138293 143.138293 ZT8-11 150.3077935 150.3077935 150.3077935 ZT12-15 121.4031265 121.4031265 121.4031265 ZT16-19 143.698326 143.698326 143.698326 ZT20-23 167.5175215 167.5175215 167.5175215