condition mean min max ZT0-3 14.990479715 8.622095384 21.358864045999997 ZT4-7 49.070904152500006 39.74818663 58.393621675000006 ZT8-11 101.74546601750001 92.454443485 111.03648855 ZT12-15 118.92563019500001 112.21557099 125.63568940000002 ZT16-19 74.1296945325 66.450866165 81.8085229 ZT20-23 53.196364044999996 51.48716314 54.90556495