condition mean min max ZT0-3 26.88403 26.88403 26.88403 ZT4-7 19.617880000000003 19.617880000000003 19.617880000000003 ZT8-11 9.82603 9.82603 9.82603 ZT12-15 21.67273 21.67273 21.67273 ZT16-19 25.503130000000002 25.503130000000002 25.503130000000002 ZT20-23 36.45784 36.45784 36.45784