condition mean min max ZT0-3 10.98443 10.98443 10.98443 ZT4-7 12.235289999999999 12.235289999999999 12.235289999999999 ZT8-11 10.950785499999999 10.950785499999999 10.950785499999999 ZT12-15 10.387174 10.387174 10.387174 ZT16-19 11.3404785 11.3404785 11.3404785 ZT20-23 10.206225 10.206225 10.206225