condition mean min max ZT0-3 176.64999999999998 176.64999999999998 176.64999999999998 ZT4-7 111.0 111.0 111.0 ZT8-11 153.25 153.25 153.25 ZT12-15 133.0 133.0 133.0 ZT16-19 162.25 162.25 162.25 ZT20-23 140.9 140.9 140.9