condition mean min max ZT0-3 42.722626 42.722626 42.722626 ZT4-7 43.465404 43.465404 43.465404 ZT8-11 49.997685000000004 49.997685000000004 49.997685000000004 ZT12-15 114.97972200000001 114.97972200000001 114.97972200000001 ZT16-19 54.508303 54.508303 54.508303 ZT20-23 89.77458949999999 89.77458949999999 89.77458949999999