condition mean min max ZT0-3 135.484973 135.484973 135.484973 ZT4-7 142.992094 142.992094 142.992094 ZT8-11 125.5676665 125.5676665 125.5676665 ZT12-15 185.221899 185.221899 185.221899 ZT16-19 151.0264475 151.0264475 151.0264475 ZT20-23 108.52725550000001 108.52725550000001 108.52725550000001