condition mean min max ZT0-3 10.3944875 10.049655 10.73932 ZT4-7 16.097 16.097 16.097 ZT8-11 9.516695 9.516695 9.516695 ZT12-15 0 0 0 ZT16-19 6.832694999999999 6.832694999999999 6.832694999999999 ZT20-23 39.2989 39.2989 39.2989