Data Science Algorithms in a Week - Second Edition

Analysis

Problem 1: 8°C is closer to 20°C than to -50°C. So, the algorithm would classify Mary as feeling warm at -8°C. But this is not likely to be true if we use our common sense and knowledge. In more complex examples, we may be deluded by the results of the analysis and make false conclusions due to our lack of expertise. But remember that data science makes use of substantive and expert knowledge, not only data analysis. In order to draw sound conclusions, we should have a good understanding of the problem and our data.

The algorithm further says that at 22°C, Mary should feel warm, and there is no doubt in that, as 22°C is higher than 20°C, and a human being feels warmer with a higher temperature; again, a trivial use of our knowledge. ...