condition mean min max ZT0-3 131.45 131.45 131.45 ZT4-7 115.7 115.7 115.7 ZT8-11 150.55 150.55 150.55 ZT12-15 171.0 171.0 171.0 ZT16-19 185.75 185.75 185.75 ZT20-23 145.45 145.45 145.45