condition mean min max ZT0-3 1.72533 1.72533 1.72533 ZT4-7 1.4218294999999999 1.4218294999999999 1.4218294999999999 ZT8-11 0.760969 0.760969 0.760969 ZT12-15 0.7353135 0.7353135 0.7353135 ZT16-19 0.2009205 0.2009205 0.2009205 ZT20-23 1.197445 1.197445 1.197445