condition mean min max ZT0-3 1674.9 1674.9 1674.9 ZT4-7 1533.5 1533.5 1533.5 ZT8-11 1564.95 1564.95 1564.95 ZT12-15 1848.0500000000002 1848.0500000000002 1848.0500000000002 ZT16-19 2115.35 2115.35 2115.35 ZT20-23 1864.3 1864.3 1864.3