condition mean min max ZT0-3 2475.0 2475.0 2475.0 ZT4-7 1903.3 1903.3 1903.3 ZT8-11 1911.9 1911.9 1911.9 ZT12-15 1864.0500000000002 1864.0500000000002 1864.0500000000002 ZT16-19 2031.85 2031.85 2031.85 ZT20-23 2396.2 2396.2 2396.2