condition mean min max ZT0-3 12.257792550000001 10.25374251 14.26184259 ZT4-7 23.2766541475 18.654569445 27.89873885 ZT8-11 35.95395513 31.1228422 40.78506806 ZT12-15 51.30339583 49.67972518 52.92706648 ZT16-19 43.298050965 42.660267425 43.935834505 ZT20-23 41.16387738 38.511336310000004 43.81641845