condition mean min max ZT0-3 334.968664 334.968664 334.968664 ZT4-7 212.423518 212.423518 212.423518 ZT8-11 100.001495 100.001495 100.001495 ZT12-15 157.71229449999998 157.71229449999998 157.71229449999998 ZT16-19 65.8197125 65.8197125 65.8197125 ZT20-23 20.3184615 20.3184615 20.3184615