condition mean min max ZT0-3 23.357697135000002 20.59627149 26.11912278 ZT4-7 20.126959475 19.389860849999998 20.8640581 ZT8-11 23.801656952499997 22.423487485 25.179826419999998 ZT12-15 44.0169519525 41.55297472 46.480929185 ZT16-19 65.382608965 63.531361759999996 67.23385617 ZT20-23 78.54328537500001 77.991597935 79.094972815