condition mean min max ZT0-3 27.022253 27.022253 27.022253 ZT4-7 32.490747 32.490747 32.490747 ZT8-11 39.3747795 39.3747795 39.3747795 ZT12-15 37.244318 37.244318 37.244318 ZT16-19 31.273567 31.273567 31.273567 ZT20-23 25.7797835 25.7797835 25.7797835