condition mean min max ZT0-3 1.726585 1.726585 1.726585 ZT4-7 1.0605005 1.0605005 1.0605005 ZT8-11 1.684305 1.684305 1.684305 ZT12-15 1.96251 1.96251 1.96251 ZT16-19 2.799245 2.799245 2.799245 ZT20-23 1.83806 1.83806 1.83806