condition mean min max ZT0-3 10.62745 10.62745 10.62745 ZT4-7 11.41005 11.41005 11.41005 ZT8-11 9.334254999999999 9.334254999999999 9.334254999999999 ZT12-15 8.165420000000001 8.165420000000001 8.165420000000001 ZT16-19 10.21729 10.21729 10.21729 ZT20-23 10.9388 10.9388 10.9388