condition mean min max ZT0-3 79.8321696225 73.061180385 86.60315886 ZT4-7 45.429801455 39.38635361 51.473249300000006 ZT8-11 36.9805592425 36.233225485000006 37.727892999999995 ZT12-15 24.4585699275 20.86279432 28.054345535 ZT16-19 43.8167213225 34.72330258 52.910140065 ZT20-23 55.041901495000005 51.62691349 58.4568895