condition mean min max ZT0-3 240.91250000000002 240.91250000000002 240.91250000000002 ZT4-7 177.2735 177.2735 177.2735 ZT8-11 115.232 115.232 115.232 ZT12-15 115.05 115.05 115.05 ZT16-19 141.815 141.815 141.815 ZT20-23 205.707 205.707 205.707