condition mean min max ZT0-3 58.879133333333336 50.626599999999996 65.32335 ZT4-7 65.7387 65.7387 65.7387 ZT8-11 50.25975 50.25975 50.25975 ZT12-15 64.32435000000001 61.470600000000005 67.1781 ZT16-19 62.57365 62.57365 62.57365 ZT20-23 54.96055 54.96055 54.96055