condition mean min max ZT0-3 48.25 48.25 48.25 ZT4-7 41.0 41.0 41.0 ZT8-11 51.15 51.15 51.15 ZT12-15 48.2 48.2 48.2 ZT16-19 49.55 49.55 49.55 ZT20-23 45.75 45.75 45.75