condition mean min max ZT0-3 27.932082597500003 21.62406506 34.240100135000006 ZT4-7 58.5475133675 57.732556145000004 59.36247059 ZT8-11 40.6748320575 35.421755935 45.92790818 ZT12-15 38.94079191 34.09339568 43.78818814 ZT16-19 92.24720539500001 76.50487074 107.98954005 ZT20-23 184.112573925 137.49452910000002 230.73061875