condition mean min max ZT0-3 0.9524712500000001 0.8219815 1.082961 ZT4-7 1.268815 1.268815 1.268815 ZT8-11 1.7930449999999998 1.7930449999999998 1.7930449999999998 ZT12-15 0 0 0 ZT16-19 1.734145 1.734145 1.734145 ZT20-23 1.437405 1.437405 1.437405