condition mean min max ZT0-3 87.215075 87.0626 87.36755 ZT4-7 27.9256 27.9256 27.9256 ZT8-11 26.92435 26.92435 26.92435 ZT12-15 0 0 0 ZT16-19 32.9027 32.9027 32.9027 ZT20-23 55.930949999999996 55.930949999999996 55.930949999999996