condition mean min max ZT0-3 63.27926029583333 54.624989095000004 71.93353149666666 ZT4-7 69.52872729166667 67.36988567 71.68756891333334 ZT8-11 66.62428014166667 64.90335964 68.34520064333333 ZT12-15 84.3582191 76.11136736 92.60507084 ZT16-19 74.07061008 73.64952910000001 74.49169106 ZT20-23 73.14971641333332 71.52001747666667 74.77941535