condition mean min max ZT0-3 94.989929 94.989929 94.989929 ZT4-7 112.502134 112.502134 112.502134 ZT8-11 201.3219215 201.3219215 201.3219215 ZT12-15 326.03449850000004 326.03449850000004 326.03449850000004 ZT16-19 274.147157 274.147157 274.147157 ZT20-23 535.2727695 535.2727695 535.2727695