condition mean min max ZT0-3 10.00612 9.91707 10.09517 ZT4-7 8.08767 8.08767 8.08767 ZT8-11 5.181900000000001 5.181900000000001 5.181900000000001 ZT12-15 0 0 0 ZT16-19 8.46584 8.46584 8.46584 ZT20-23 9.299045 9.299045 9.299045