condition mean min max ZT0-3 1.833825 1.833155 1.834495 ZT4-7 0.9473075 0.9473075 0.9473075 ZT8-11 0.8132345000000001 0.8132345000000001 0.8132345000000001 ZT12-15 0 0 0 ZT16-19 1.081455 1.081455 1.081455 ZT20-23 1.3347449999999998 1.3347449999999998 1.3347449999999998