condition mean min max ZT0-3 644.232057 644.232057 644.232057 ZT4-7 644.520548 644.520548 644.520548 ZT8-11 610.0470215 610.0470215 610.0470215 ZT12-15 614.6785955 614.6785955 614.6785955 ZT16-19 797.0927790000001 797.0927790000001 797.0927790000001 ZT20-23 834.2047355 834.2047355 834.2047355