condition mean min max ZT0-3 123.0 123.0 123.0 ZT4-7 73.4 73.4 73.4 ZT8-11 65.2 65.2 65.2 ZT12-15 111.8 111.8 111.8 ZT16-19 83.75 83.75 83.75 ZT20-23 118.05000000000001 118.05000000000001 118.05000000000001