condition mean min max ZT0-3 298.920782 298.920782 298.920782 ZT4-7 222.27274649999998 222.27274649999998 222.27274649999998 ZT8-11 249.0496255 249.0496255 249.0496255 ZT12-15 256.8059405 256.8059405 256.8059405 ZT16-19 307.506617 307.506617 307.506617 ZT20-23 317.9411095 317.9411095 317.9411095