condition mean min max ZT0-3 123.330043 123.330043 123.330043 ZT4-7 115.202251 115.202251 115.202251 ZT8-11 142.812429 142.812429 142.812429 ZT12-15 166.35216050000002 166.35216050000002 166.35216050000002 ZT16-19 159.5649745 159.5649745 159.5649745 ZT20-23 121.883352 121.883352 121.883352