condition mean min max ZT0-3 67.179139925 66.93324366 67.42503619 ZT4-7 50.105225475000005 42.892173060000005 57.318277890000005 ZT8-11 23.618387245 17.617850495 29.618923995 ZT12-15 18.5395624825 14.996533305 22.08259166 ZT16-19 37.7018390275 33.764781174999996 41.63889688 ZT20-23 41.446202285 41.20987008 41.68253449