condition mean min max ZT0-3 847.232057 847.232057 847.232057 ZT4-7 1494.9151570000001 1494.9151570000001 1494.9151570000001 ZT8-11 2336.5268225 2336.5268225 2336.5268225 ZT12-15 2383.0389370000003 2383.0389370000003 2383.0389370000003 ZT16-19 1385.5988495000001 1385.5988495000001 1385.5988495000001 ZT20-23 889.406757 889.406757 889.406757