condition mean min max ZT0-3 113.126428 113.126428 113.126428 ZT4-7 152.75045799999998 152.75045799999998 152.75045799999998 ZT8-11 150.180787 150.180787 150.180787 ZT12-15 134.30003 134.30003 134.30003 ZT16-19 146.43032699999998 146.43032699999998 146.43032699999998 ZT20-23 113.742256 113.742256 113.742256