condition mean min max ZT0-3 0.6959996666666667 0.6040795 0.865083 ZT4-7 0.7493110000000001 0.7493110000000001 0.7493110000000001 ZT8-11 1.001708 1.001708 1.001708 ZT12-15 0.935157 0.782234 1.08808 ZT16-19 0.9682885000000001 0.9682885000000001 0.9682885000000001 ZT20-23 1.0943455 1.0943455 1.0943455