condition mean min max ZT0-3 359.821071 359.821071 359.821071 ZT4-7 142.121667 142.121667 142.121667 ZT8-11 158.472462 158.472462 158.472462 ZT12-15 229.90617450000002 229.90617450000002 229.90617450000002 ZT16-19 355.2440625 355.2440625 355.2440625 ZT20-23 360.0554025 360.0554025 360.0554025