condition mean min max ZT0-3 0.8364486666666666 0.464765 1.0253174999999999 ZT4-7 0.430929 0.430929 0.430929 ZT8-11 0.6675195 0.6675195 0.6675195 ZT12-15 1.3756325 1.15964 1.591625 ZT16-19 0.7379255 0.7379255 0.7379255 ZT20-23 0.6026644999999999 0.6026644999999999 0.6026644999999999