condition mean min max ZT0-3 87.75 87.75 87.75 ZT4-7 133.2 133.2 133.2 ZT8-11 133.45 133.45 133.45 ZT12-15 122.1 122.1 122.1 ZT16-19 166.4 166.4 166.4 ZT20-23 132.55 132.55 132.55