condition mean min max ZT0-3 386.704856925 378.27026835 395.1394455 ZT4-7 190.19422242500002 168.25964375 212.1288011 ZT8-11 348.63935822499997 249.3173587 447.96135774999993 ZT12-15 415.6494048999999 376.79585964999995 454.50295014999995 ZT16-19 257.10393215 244.3392404 269.8686239 ZT20-23 240.66556857499998 237.20719179999998 244.12394534999999