condition mean min max ZT0-3 207.25 207.25 207.25 ZT4-7 157.6 157.6 157.6 ZT8-11 154.3 154.3 154.3 ZT12-15 160.39999999999998 160.39999999999998 160.39999999999998 ZT16-19 182.55 182.55 182.55 ZT20-23 248.75 248.75 248.75