condition mean min max ZT0-3 113.94999999999999 113.94999999999999 113.94999999999999 ZT4-7 111.2 111.2 111.2 ZT8-11 176.89999999999998 176.89999999999998 176.89999999999998 ZT12-15 269.45 269.45 269.45 ZT16-19 272.7 272.7 272.7 ZT20-23 192.3 192.3 192.3