Hi Prof Michael, While running the % ./best_predictor sample2.tsv to generate the expected output. I am getting a different score like following with the provided data in sample2.tsv. GDP per capita: 0.925 Population: -0.989 Homicide Rate: -0.889 Life Expectancy: 0.957 (r = 0.98923) These results are different from the expected output. With this data, I tried with the Python script to produce these calculations and got the same result as above. So my question is, Are these calculations from sample 2.tsv correct or do we need to validate anything else ? Or can you please share any other data source so we can test the correct calculation and see if any difference in the output or script design ? Thanks for your guidance and help.