condition mean min max ZT0-3 211.670400925 175.25739695 248.0834049 ZT4-7 97.8430940525 97.795659685 97.89052842000001 ZT8-11 127.9307443275 106.820120705 149.04136795 ZT12-15 100.69615411500001 90.03044869 111.36185954000001 ZT16-19 122.94624097500002 117.21498280000002 128.67749915000002 ZT20-23 148.099994525 141.6002315 154.59975755