condition mean min max ZT0-3 7.54855 7.367929999999999 7.72917 ZT4-7 5.131550000000001 5.131550000000001 5.131550000000001 ZT8-11 11.68875 11.68875 11.68875 ZT12-15 0 0 0 ZT16-19 12.8662 12.8662 12.8662 ZT20-23 9.47768 9.47768 9.47768