condition mean min max ZT0-3 16.48356 11.551929999999999 21.494 ZT4-7 4.59939 4.59939 4.59939 ZT8-11 5.320565 5.320565 5.320565 ZT12-15 5.48749 3.027585 7.947395 ZT16-19 3.156635 3.156635 3.156635 ZT20-23 10.325949999999999 10.325949999999999 10.325949999999999