How long do different programmers take to solve the same task?
In 1967, Grant and Sackman published their now famous number of
interpersonal performance differences, which is both incorrect
This report presents the analysis of a much larger dataset of
engineering work time data with respect to the
same question. It corrects the false 28:1 value, proposes more
metrics, presents the results for the larger dataset,
and presents results of several further analyses:
distribution shapes, effect sizes,
and the performance of various significance tests.