condition mean min max ZT0-3 105.365574 105.365574 105.365574 ZT4-7 132.612259 132.612259 132.612259 ZT8-11 128.7549365 128.7549365 128.7549365 ZT12-15 134.5779125 134.5779125 134.5779125 ZT16-19 117.599289 117.599289 117.599289 ZT20-23 111.3058255 111.3058255 111.3058255