condition mean min max ZT0-3 383.115416 383.115416 383.115416 ZT4-7 352.297413 352.297413 352.297413 ZT8-11 286.356307 286.356307 286.356307 ZT12-15 343.57342900000003 343.57342900000003 343.57342900000003 ZT16-19 318.568196 318.568196 318.568196 ZT20-23 341.751489 341.751489 341.751489