condition mean min max ZT0-3 372.529294 372.529294 372.529294 ZT4-7 340.7415205 340.7415205 340.7415205 ZT8-11 116.906214 116.906214 116.906214 ZT12-15 144.6833445 144.6833445 144.6833445 ZT16-19 206.00054350000002 206.00054350000002 206.00054350000002 ZT20-23 564.734291 564.734291 564.734291