condition mean min max ZT0-3 18.1426502375 17.78659602 18.498704455000002 ZT4-7 27.679476655000002 25.39650812 29.96244519 ZT8-11 60.3146815025 46.2859761 74.343386905 ZT12-15 55.746534024999995 49.052599855 62.440468194999994 ZT16-19 42.5897026925 38.16335163 47.016053755 ZT20-23 23.2107368375 20.169095815 26.25237786