Questions

1. What method would be better to find a correlation between a numerical and a categorical variable?
2. Build some other plot graphs between a pair of variables and study the correlations and the logic behind them.
3. Does a negative Pearson coefficient value imply that one of the variables has negative values?
4. The table of the Pearson's coefficient can be colored or have bars added to it in order to better compare the different values. Explore these options in Quick Analysis | Formatting.
5. The quality of the least square regression is usually measured by the value of R². Calculate this value for the function that was adjusted in the mpg column versus the weight data value (hint: you only need to calculate one more sum of values – refer to the literature for more information).
6. The value that was calculated in the previous question should be close to 0.7, which is...