condition mean min max ZT0-3 0.11723335174999999 0.1047027265 0.129763977 ZT4-7 0.22544318975 0.023362165 0.4275242145 ZT8-11 10.817494327 5.4784872235 16.1565014305 ZT12-15 20.124003015 19.62498478 20.62302125 ZT16-19 12.364186247500001 11.708563625 13.01980887 ZT20-23 14.195060315 11.81672735 16.573393279999998