condition mean min max ZT0-3 27.093206532499998 13.377410315 40.80900275 ZT4-7 46.23543591166667 44.536006586666666 47.93486523666667 ZT8-11 33.18923327 24.44239817 41.93606837 ZT12-15 75.14684853 66.39175691999999 83.90194014 ZT16-19 59.02920992 55.855004226666665 62.203415613333334 ZT20-23 46.35964375166667 43.53981550333334 49.179472000000004