condition mean min max ZT0-3 62.482575000000004 54.4276 70.53755000000001 ZT4-7 47.5217 47.5217 47.5217 ZT8-11 34.92815 34.92815 34.92815 ZT12-15 0 0 0 ZT16-19 24.4075 24.4075 24.4075 ZT20-23 30.34865 30.34865 30.34865