condition mean min max ZT0-3 1932.15 1932.15 1932.15 ZT4-7 2383.9 2383.9 2383.9 ZT8-11 1830.5 1830.5 1830.5 ZT12-15 786.25 786.25 786.25 ZT16-19 390.55 390.55 390.55 ZT20-23 639.15 639.15 639.15