condition mean min max ZT0-3 154.64999999999998 154.64999999999998 154.64999999999998 ZT4-7 96.7 96.7 96.7 ZT8-11 73.35 73.35 73.35 ZT12-15 122.75 122.75 122.75 ZT16-19 157.64999999999998 157.64999999999998 157.64999999999998 ZT20-23 178.64999999999998 178.64999999999998 178.64999999999998