condition mean min max ZT0-3 1.8674198452500002 1.799521039 1.9353186515000003 ZT4-7 1.451408228 1.160005169 1.742811287 ZT8-11 1.7200683589999999 1.303507295 2.136629423 ZT12-15 2.13341341075 2.0173973634999998 2.249429458 ZT16-19 2.3871982585000002 2.1467604685 2.6276360485000003 ZT20-23 2.92493313825 2.6811098335 3.168756443