condition mean min max ZT0-3 90.9608407475 80.446251195 101.4754303 ZT4-7 39.967687052500004 39.133966400000006 40.801407705 ZT8-11 59.826225515 51.42328279 68.22916823999999 ZT12-15 77.648118185 75.79129315 79.50494322 ZT16-19 72.550400865 67.75441180499999 77.34638992500001 ZT20-23 79.218513855 75.023823705 83.413204005