condition mean min max ZT0-3 32.56794 32.56794 32.56794 ZT4-7 37.78374 37.78374 37.78374 ZT8-11 39.352244 39.352244 39.352244 ZT12-15 34.147574 34.147574 34.147574 ZT16-19 54.169698000000004 54.169698000000004 54.169698000000004 ZT20-23 53.882279999999994 53.882279999999994 53.882279999999994