condition mean min max ZT0-3 264.494028 264.494028 264.494028 ZT4-7 164.03912449999999 164.03912449999999 164.03912449999999 ZT8-11 187.346271 187.346271 187.346271 ZT12-15 181.02596699999998 181.02596699999998 181.02596699999998 ZT16-19 340.367039 340.367039 340.367039 ZT20-23 346.77383999999995 346.77383999999995 346.77383999999995