Success, Ability, and all that

I came across this nice discussion at LessWrong which is similar to my old post Success vs Ability. The illustration below shows why even a strong predictor of outcome is seldom able to pick out the very top performer: e.g., taller people are on average better at basketball, but the best player in the world is …

More

Correlation and Variance

In social science a correlation of R = 0.4 between two variables is typically considered a strong result. For example, both high school GPA and SAT score predict college performance with R ~ 0.4. Combining the two, one can achieve R ~ 0.5 to 0.6, depending on major. See Table 2 in my paper Data Mining …

More