Fig. 3
From: Development of new 9-ball test protocols for assessing expertise in cue sports
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13102-021-00237-9/MediaObjects/13102_2021_237_Fig3_HTML.png)
Correlations between 9-ball skill tests (absolute error distance and variability) and the 15-ball performance test (number of balls potted in best 2 out of 3 trials). The recreational group is shown in green squares; the university team is shown in red triangle; the national team is shown in blue dot