condition mean min max ZT0-3 76.66645 76.66645 76.66645 ZT4-7 67.55834999999999 67.55834999999999 67.55834999999999 ZT8-11 63.2004 63.2004 63.2004 ZT12-15 62.2307 62.2307 62.2307 ZT16-19 69.52995 69.52995 69.52995 ZT20-23 78.59309999999999 78.59309999999999 78.59309999999999