condition mean min max ZT0-3 10.0392575 9.680695 10.39782 ZT4-7 11.093599999999999 11.093599999999999 11.093599999999999 ZT8-11 4.642424999999999 4.642424999999999 4.642424999999999 ZT12-15 0 0 0 ZT16-19 5.2863299999999995 5.2863299999999995 5.2863299999999995 ZT20-23 11.2925 11.2925 11.2925