condition mean min max ZT0-3 14.6712 14.438400000000001 14.904 ZT4-7 8.891290000000001 8.891290000000001 8.891290000000001 ZT8-11 6.795565 6.795565 6.795565 ZT12-15 0 0 0 ZT16-19 11.204899999999999 11.204899999999999 11.204899999999999 ZT20-23 10.315214999999998 10.315214999999998 10.315214999999998