condition mean min max ZT0-3 459.870462 459.870462 459.870462 ZT4-7 316.0980285 316.0980285 316.0980285 ZT8-11 406.9114565 406.9114565 406.9114565 ZT12-15 383.7875665 383.7875665 383.7875665 ZT16-19 437.715998 437.715998 437.715998 ZT20-23 554.3590055 554.3590055 554.3590055