condition mean min max ZT0-3 148.808924 148.808924 148.808924 ZT4-7 182.76606149999998 182.76606149999998 182.76606149999998 ZT8-11 154.4820565 154.4820565 154.4820565 ZT12-15 166.735231 166.735231 166.735231 ZT16-19 164.503964 164.503964 164.503964 ZT20-23 156.68244099999998 156.68244099999998 156.68244099999998