condition mean min max ZT0-3 215.54000000000002 215.54000000000002 215.54000000000002 ZT4-7 563.0185 563.0185 563.0185 ZT8-11 441.696 441.696 441.696 ZT12-15 161.3265 161.3265 161.3265 ZT16-19 83.14515 83.14515 83.14515 ZT20-23 82.41114999999999 82.41114999999999 82.41114999999999