condition mean min max ZT0-3 14.781400000000001 14.781400000000001 14.781400000000001 ZT4-7 12.2927 12.2927 12.2927 ZT8-11 7.74788 7.74788 7.74788 ZT12-15 6.76729 6.76729 6.76729 ZT16-19 9.77832 9.77832 9.77832 ZT20-23 17.211599999999997 17.211599999999997 17.211599999999997