condition mean min max ZT0-3 11.657338 11.657338 11.657338 ZT4-7 13.820246000000001 13.820246000000001 13.820246000000001 ZT8-11 14.378381000000001 14.378381000000001 14.378381000000001 ZT12-15 10.846632 10.846632 10.846632 ZT16-19 14.625585999999998 14.625585999999998 14.625585999999998 ZT20-23 12.438771 12.438771 12.438771