condition mean min max ZT0-3 79.467384 79.467384 79.467384 ZT4-7 269.518226 269.518226 269.518226 ZT8-11 211.773863 211.773863 211.773863 ZT12-15 143.3656015 143.3656015 143.3656015 ZT16-19 112.141541 112.141541 112.141541 ZT20-23 121.70359450000001 121.70359450000001 121.70359450000001