condition mean min max ZT0-3 36.60761715333334 34.87937698 38.33585732666666 ZT4-7 41.561086445 40.8587003 42.26347259 ZT8-11 48.69076437333334 45.75028074666667 51.631248 ZT12-15 46.796919290000005 45.49116891 48.102669670000004 ZT16-19 48.041758064999996 44.14918870333334 51.93432742666666 ZT20-23 52.40455411 49.83871297333333 54.97039524666667