condition mean min max ZT0-3 233.155134 233.155134 233.155134 ZT4-7 161.1883825 161.1883825 161.1883825 ZT8-11 125.5230505 125.5230505 125.5230505 ZT12-15 148.321913 148.321913 148.321913 ZT16-19 129.61405100000002 129.61405100000002 129.61405100000002 ZT20-23 109.6332515 109.6332515 109.6332515