condition mean min max ZT0-3 2281.51648925 2270.1300645 2292.9029140000002 ZT4-7 2147.45191625 1717.7725645 2577.131268 ZT8-11 2109.55809625 2033.110648 2186.0055445 ZT12-15 3638.7311135 2998.7511400000003 4278.711087 ZT16-19 4017.8246585 3859.303444 4176.345873 ZT20-23 3268.78683275 3056.517147 3481.0565185000005