condition mean min max ZT0-3 120.919703 120.919703 120.919703 ZT4-7 86.9425675 86.9425675 86.9425675 ZT8-11 81.07334850000001 81.07334850000001 81.07334850000001 ZT12-15 102.4243985 102.4243985 102.4243985 ZT16-19 154.329804 154.329804 154.329804 ZT20-23 263.683863 263.683863 263.683863