condition mean min max ZT0-3 1.4032215 1.257722 1.6472875 ZT4-7 0.4050205 0.4050205 0.4050205 ZT8-11 0.374962 0.374962 0.374962 ZT12-15 1.2489787499999998 0.4555575 2.0423999999999998 ZT16-19 0.76294 0.76294 0.76294 ZT20-23 3.1825200000000002 3.1825200000000002 3.1825200000000002