condition mean min max ZT0-3 46.0217178575 45.474254285 46.56918143 ZT4-7 50.635485810000006 44.865153585 56.405818035 ZT8-11 66.55049383 52.81747779 80.28350986999999 ZT12-15 199.40658200000001 197.30049615000001 201.51266784999999 ZT16-19 208.5717036 176.85915595 240.28425125 ZT20-23 135.11205959999998 120.17210234999999 150.05201684999997