condition mean min max ZT0-3 90.90238333333333 70.7572 106.0151 ZT4-7 50.3635 50.3635 50.3635 ZT8-11 60.4754 60.4754 60.4754 ZT12-15 106.61897499999999 101.66895 111.56899999999999 ZT16-19 118.6315 118.6315 118.6315 ZT20-23 126.643 126.643 126.643