condition mean min max ZT0-3 0.7899613333333334 0.2664385 1.551765 ZT4-7 0.5684675 0.5684675 0.5684675 ZT8-11 0.656149 0.656149 0.656149 ZT12-15 1.17972675 0.6806135 1.67884 ZT16-19 0.726488 0.726488 0.726488 ZT20-23 0.945936 0.945936 0.945936