condition mean min max ZT0-3 367.232057 367.232057 367.232057 ZT4-7 327.61743850000005 327.61743850000005 327.61743850000005 ZT8-11 410.2758335 410.2758335 410.2758335 ZT12-15 459.0573005 459.0573005 459.0573005 ZT16-19 376.31926450000003 376.31926450000003 376.31926450000003 ZT20-23 351.72796600000004 351.72796600000004 351.72796600000004