condition mean min max ZT0-3 14.4614 14.4614 14.4614 ZT4-7 10.475200000000001 10.475200000000001 10.475200000000001 ZT8-11 9.263314999999999 9.263314999999999 9.263314999999999 ZT12-15 12.3046 12.3046 12.3046 ZT16-19 11.95785 11.95785 11.95785 ZT20-23 13.813849999999999 13.813849999999999 13.813849999999999