condition mean min max ZT0-3 80.41175 41.87065 106.18175 ZT4-7 62.502449999999996 62.502449999999996 62.502449999999996 ZT8-11 39.205 39.205 39.205 ZT12-15 69.8616 63.11235 76.61085 ZT16-19 109.883 109.883 109.883 ZT20-23 131.9515 131.9515 131.9515