condition mean min max ZT0-3 11.55405 11.467749999999999 11.640350000000002 ZT4-7 7.961155 7.961155 7.961155 ZT8-11 10.25981 10.25981 10.25981 ZT12-15 0 0 0 ZT16-19 12.27805 12.27805 12.27805 ZT20-23 11.7832 11.7832 11.7832