condition mean min max ZT0-3 111.315703 111.315703 111.315703 ZT4-7 115.84166450000001 115.84166450000001 115.84166450000001 ZT8-11 133.336737 133.336737 133.336737 ZT12-15 103.63647999999999 103.63647999999999 103.63647999999999 ZT16-19 114.8016615 114.8016615 114.8016615 ZT20-23 102.957119 102.957119 102.957119