condition mean min max ZT0-3 47.434215 47.434215 47.434215 ZT4-7 56.0711545 56.0711545 56.0711545 ZT8-11 46.535091 46.535091 46.535091 ZT12-15 60.4648035 60.4648035 60.4648035 ZT16-19 65.242603 65.242603 65.242603 ZT20-23 135.8389265 135.8389265 135.8389265