condition mean min max ZT0-3 94.939795 94.939795 94.939795 ZT4-7 90.6497235 90.6497235 90.6497235 ZT8-11 123.85611 123.85611 123.85611 ZT12-15 114.9521805 114.9521805 114.9521805 ZT16-19 173.821767 173.821767 173.821767 ZT20-23 135.5643585 135.5643585 135.5643585