condition mean min max ZT0-3 11.283604 11.283604 11.283604 ZT4-7 12.874165000000001 12.874165000000001 12.874165000000001 ZT8-11 11.381629 11.381629 11.381629 ZT12-15 11.989433 11.989433 11.989433 ZT16-19 10.878767 10.878767 10.878767 ZT20-23 13.264712 13.264712 13.264712