condition mean min max ZT0-3 78.15 78.15 78.15 ZT4-7 58.0 58.0 58.0 ZT8-11 111.9 111.9 111.9 ZT12-15 53.5 53.5 53.5 ZT16-19 94.44999999999999 94.44999999999999 94.44999999999999 ZT20-23 123.65 123.65 123.65