condition mean min max ZT0-3 0.53434475 0.477874 0.5908154999999999 ZT4-7 1.135715 1.135715 1.135715 ZT8-11 0.8385775 0.8385775 0.8385775 ZT12-15 0 0 0 ZT16-19 1.1171475 1.1171475 1.1171475 ZT20-23 1.238805 1.238805 1.238805